Delicious & Easy Vegan Berry Baked Oatmeal: Your Ultimate Healthy Breakfast Casserole for Meal Prep
Revolutionize your mornings with this incredibly Easy Vegan Baked Oatmeal. Bursting with flavor and packed with heart-healthy fiber and wholesome plant-based protein, this delightful breakfast will keep you feeling energized and satisfied long past the breakfast table. Our Berry Baked Oatmeal is not just a treat for your taste buds; it’s a true champion for meal prep, a vibrant centerpiece for any brunch spread, and the perfect solution for even the most hectic weekday mornings.

This post has been lovingly updated and expanded from its original publication on September 7, 2016, to bring you even more tips and insights for a perfect vegan baked oatmeal.
Imagine starting your day with a warm, comforting breakfast casserole that’s not only incredibly delicious but also remarkably easy to prepare. And what if we told you it’s also a powerhouse of nutrition, aligning perfectly with your healthy eating goals? If that sounds like your ideal morning, then get ready to elevate your breakfast game, because this vegan baked oatmeal recipe is exactly what you’ve been searching for!
I firmly believe that kickstarting each day with a nourishing breakfast is the foundation for a successful and productive day. My love for oatmeal and fresh berries runs deep – not just for their vibrant taste, but for the sustained energy and rich nutrition they provide. There’s an unparalleled feeling of contentment and wholesome satisfaction after enjoying a meal that truly fuels your body without leaving you feeling heavy or overindulged. This berry baked oatmeal delivers precisely that experience.
What makes this oatmeal bake truly stand out is its simplicity. It requires just one bowl for mixing, making cleanup a breeze and getting it into the oven in mere minutes. This is the ultimate make-ahead breakfast, effortlessly transforming from a grab-and-go option to a reheated delight. Its attractive appearance, with the colorful berries peeking through a golden-brown oat base, also makes it a magnificent addition to any brunch buffet, impressing guests with minimal effort. For those following a grain-free diet, a similar comforting experience can be found with this quinoa breakfast casserole, but for classic oat goodness, you’re in the right place!
Why You’ll Fall in Love with This Vegan Baked Oatmeal

- Your Healthy Breakfast Dream Realized: We all wish for healthy breakfasts but often feel short on time. This recipe proves you *do* have time for a truly nourishing start to your day! It’s designed for efficiency without sacrificing health.
- Pantry Staple Friendly: No need for exotic ingredients! This recipe relies on common items you likely already have in your kitchen, making it a convenient and budget-friendly choice.
- Naturally Vegan and Gluten-Free: Perfect for those with dietary restrictions or anyone looking to incorporate more plant-based and gluten-free options into their diet. This recipe uses no animal products and is safe for gluten sensitivities (just be sure to use certified gluten-free oats).
- Versatile for Any Occasion: While it shines as a hearty breakfast, its delightful flavor and satisfying texture make it equally perfect for a leisurely brunch, a wholesome afternoon snack, or even a light, guilt-free dessert.
- Lightning Fast Prep (1-Bowl Wonder): Imagine having your breakfast casserole ready for the oven in just 5 minutes! This single-bowl method minimizes cleanup and maximizes your precious morning time.
- Effortless Meal Prep: Prepare a batch on Sunday, and enjoy healthy, delicious breakfasts all week long. It reheats beautifully and can even be enjoyed cold, making busy mornings a breeze.
- Ultimate Comfort Food, Reinvented: This baked oatmeal offers the warm, cozy comfort of your favorite breakfast casserole but with a light, healthy twist. It’s deeply satisfying without feeling heavy, providing sustained energy.
- No Added Refined Sugar: Sweetened naturally with applesauce, berries, and a touch of maple syrup in the topping, this recipe avoids refined sugars, keeping it wholesome and balanced.
- Rich in Protein and Fiber: Thanks to the oats, flax seeds, hemp seeds, and nuts, this baked oatmeal is a nutritional powerhouse, providing essential protein and fiber to keep you feeling full, regulate blood sugar, and support digestive health.
Key Ingredients and Smart Substitutions

- OLD FASHIONED OATS: These are the star of our baked oatmeal! Old fashioned oats are a fantastic source of soluble fiber, which is crucial for managing blood sugar levels and promoting a feeling of fullness. They also boast a rich profile of antioxidants. For the best texture and nutritional benefits, stick to old fashioned oats. Quick-cooking oats are processed differently, resulting in less fiber and a mushier texture, and they absorb liquid differently, so they are not recommended as a direct substitute. Ensure they are certified gluten-free if needed.
- BERRIES: Fresh or frozen, berries are a low-glycemic index fruit, making them an excellent choice for a healthy breakfast. They are naturally low in calories and carbohydrates but pack a powerful punch of flavor and essential nutrients. Their availability year-round (thanks to frozen options!) makes this a versatile recipe.
* Good Substitutions: Feel free to experiment with other fruits! Chopped apples, banana chunks, or diced stone fruits like plums, peaches, or nectarines all work wonderfully. If using very juicy fruits or frozen berries (without reducing liquid slightly), you might want to slightly reduce the almond milk by about ¼ cup to maintain the right consistency. - ALMOND MILK: This plant-based milk adds creaminess and moisture without dairy. You can even make your own homemade almond milk for an extra fresh touch.
* Good Substitutions: If you have nut allergies, oat milk or soy milk are excellent alternatives. Simply use your favorite plant-based milk. - APPLE SAUCE: Unsweetened applesauce acts as a natural sweetener and a binder in this vegan recipe, keeping it moist and adding a subtle fruity flavor. It’s a nutritious way to enhance texture and taste without relying on eggs or excess oil.
* Good Substitutions: Mashed ripe banana or pumpkin puree can be used interchangeably for a similar binding and moisture effect, each adding its own unique subtle flavor profile. - GROUND FLAX SEEDS: These tiny powerhouses are rich in Omega-3 fatty acids, protein, and fiber. In this recipe, ground flax seeds also serve as a crucial plant-based binding agent, helping the oatmeal hold its shape without eggs.
* Good Substitutions: Chia seeds are a fantastic alternative, offering similar nutritional benefits and binding properties. - BAKING POWDER: A small amount of baking powder is essential for giving the baked oatmeal a lighter, fluffier texture, preventing it from becoming too dense. It helps it rise slightly and creates a more appealing crumb.
- CINNAMON: This warm spice is not just for flavor; it cleverly enhances the perception of sweetness in baked goods, allowing us to keep added sweeteners to a minimum. It adds a cozy, aromatic depth to the oatmeal.
- WALNUTS (for topping): Chopped nuts add a delightful crunch and texture to the topping, significantly boosting the protein content and healthy Omega-3s, making this make-ahead vegan breakfast even more nutritious.
* Good Substitutions: Feel free to use your favorite nuts such as almonds or pecans. For those with nut allergies, pumpkin seeds or sunflower seeds are excellent and equally crunchy alternatives. - HEMP SEEDS (for topping): Hemp seeds are a superfood, offering an impressive source of plant-based protein, dietary fiber, and healthy fats. They contribute to the topping’s texture and nutritional value.
* Good Substitutions: Chia seeds or additional ground flax seeds can be used if you don’t have hemp seeds on hand. - MAPLE SYRUP (for topping): A touch of pure maple syrup in the topping helps bind the crunchy ingredients together and adds a perfectly balanced, natural sweetness. It’s the only added sweetener in this otherwise sugar-free baked oatmeal base.
- VANILLA EXTRACT: Like cinnamon, vanilla extract is a magical ingredient that enhances the perception of sweetness and depth of flavor in baked goods, creating a more satisfying taste experience without extra sugar.
Effortless Preparation: How to Make Your Berry Baked Oatmeal
Get ready for one of the quickest and most straightforward breakfast casseroles you’ll ever create. This recipe is designed to be in your oven in under 5 minutes – seriously, I promise! And the best part? You’ll only have one bowl to wash. This is truly the poster child for efficient meal prep!

Begin by combining your wet ingredients: pour the almond milk, applesauce, and vanilla extract into a medium-sized mixing bowl.

Whisk these ingredients thoroughly until the applesauce is smoothly and completely incorporated into the liquid mixture, ensuring a uniform base for your oatmeal.

Next, add your dry ingredients directly to the bowl with the milk mixture: the old-fashioned oats, ground flaxseed, cinnamon, baking powder, and a pinch of sea salt.

Whisk everything together until all the ingredients are well combined and the mixture has a uniform, slightly thick texture. Ensure no dry spots remain.

Now it’s time for the star fruit! Add 1½ cups of your favorite fresh or frozen berries to the oat mixture. This recipe truly shines with a mix of blueberries and raspberries.

Gently fold the berries into the mixture using a spatula to ensure they are evenly distributed without crushing them. This helps keep them whole and visually appealing. Once mixed, pour the entire oatmeal mixture into your chosen baking pan, freeing up that same mixing bowl for the delicious topping.

In the same mixing bowl you just used (hooray for minimal cleanup!), combine all the topping ingredients: the remaining chopped nuts, oats, hemp seeds, cinnamon, and maple syrup.

Stir these ingredients thoroughly until they are well combined. The topping mixture will be wonderfully sticky and thick, ready to create a delicious, crunchy crust.

Carefully pour and spread the main oatmeal mixture evenly into a 2-quart casserole dish (an 8-inch square or 11×7-inch rectangle works perfectly).

Generously distribute the prepared crunchy topping mixture evenly over the entire surface of the oatmeal base in the baking pan, creating a golden, textural layer.

For an extra burst of freshness and visual appeal, sprinkle the remaining ½ cup of berries over the top of the crunchy topping before baking.

Finally, bake your beautiful creation in a preheated 350°F (175°C) oven for approximately 45 minutes, or until the oatmeal is set and the topping is lightly golden brown and irresistibly crispy.
Debra’s Pro Tips for the Perfect Baked Oatmeal:

- Mastering Frozen Berries: Don’t have fresh berries on hand? No problem! Frozen berries work beautifully in this recipe and don’t even need to be thawed. Just be aware that frozen berries release a bit more water as they bake. To counteract this, reduce the amount of almond milk by just a tiny bit (about ¼ cup) to maintain the perfect consistency.
- Indulge Your Chocolate Cravings: If you’re longing for a sweeter, more decadent twist, swap out some or all of the berries for vegan chocolate chips. Life is short – YOLO (You Only Live Once), so treat yourself to chocolate baked oatmeal!
- Clever Apple Utilization: Have an abundance of apples from the orchard or farmer’s market? Dice them up and incorporate them into the baked oatmeal! They can be used in conjunction with the berries for a mixed fruit flavor, or entirely in place of them for a classic apple cinnamon experience.
- Overnight Prep for Stress-Free Mornings: For those mornings when every minute counts, this recipe is your savior. Mix all the oatmeal ingredients (excluding the topping and any reserved berries for sprinkling) in your baking dish the night before. Cover it tightly and store it in the refrigerator overnight. In the morning, simply add the topping and remaining berries, then pop it directly into the oven to bake. This allows you to wake up to a fresh, warm breakfast with almost no effort!
- Portioning for Convenience: Once baked and cooled slightly, cut the oatmeal into individual squares. These are perfect for grabbing on the go, packing in lunch boxes, or freezing for future quick breakfasts.
- Reheating Perfection: To reheat individual servings, cover loosely with foil and warm in a 325°F (160°C) oven for about 10-15 minutes, or until heated through. A quick zap in the microwave also works, though the topping might lose a little crunch.
More Delicious Vegan Meal Prep Recipes
Looking for more ways to make healthy eating easier throughout your week? Explore these other fantastic vegan meal prep recipes:
- 5-Minute Vegan Tuna Salad
- Crunchy Baked Granola Bars
- Wholesome Morning Glory Muffins
- Hearty Vegan Stuffed Cabbage
- The Best Vegan Caesar Dressing
- Flavorful Mexican Pinto Beans
- Quick Food Processor Chopped Salad
- Nutritional Powerhouse Carrot Ginger Soup
📖 Recipe

Berry Baked Oatmeal
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Ingredients
Oatmeal Base
- ¼ cup unsweetened apple sauce*
- 2 cups almond milk
- 1 teaspoon pure vanilla extract
- 2 cups old fashioned oats (certified gluten-free if desired)
- ¼ cup ground flax seeds
- 1 teaspoon baking powder
- 1 teaspoon ground cinnamon
- pinch of sea salt
- 2 cups fresh or frozen mixed berries* (divided)
Crunchy Topping:
- ½ cup chopped walnuts*
- ⅓ cup old fashioned oats
- 2 Tablespoons hemp seeds
- 1 teaspoon ground cinnamon
- ¼ cup pure maple syrup
- Pinch sea salt
Instructions
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Preheat your oven to 350°F (175°C).
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In a medium-sized mixing bowl, whisk together the unsweetened applesauce, almond milk, and pure vanilla extract until well combined and smooth.
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Add the old-fashioned oats, ground flax seeds, cinnamon, baking powder, and a pinch of sea salt to the bowl with the wet ingredients. Mix everything thoroughly until the dry ingredients are fully incorporated into the liquid mixture, ensuring a uniform consistency.
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Gently fold in 1½ cups of your fresh or frozen berries. Be careful not to mash them, keeping them as whole as possible for bursts of fruitiness.
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Pour the oatmeal mixture evenly into a 2-quart baking dish (an 8-inch square or 11×7-inch rectangle works best).
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Using the same bowl (no extra dishes!), mix together the topping ingredients: chopped walnuts, oats, hemp seeds, cinnamon, pure maple syrup, and a pinch of sea salt. Stir until everything is well coated and the mixture is sticky.
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Evenly distribute the prepared topping over the oatmeal mixture in the baking pan. Then, sprinkle the remaining ½ cup of berries over the top of the crunchy topping for a beautiful finish.
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Bake for 45 minutes, or until the oatmeal is visibly set and the topping has achieved a beautiful, golden-brown hue.
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Allow the baked oatmeal to cool in the pan for at least 5 minutes before slicing it into squares. This helps it firm up and makes for cleaner cuts.
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Serve warm, at room temperature, or even cold! Any leftovers should be refrigerated. To reheat, gently warm portions in a 325°F (160°C) oven for about 15 minutes, or until heated through.
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For the ultimate convenience, freeze individual serving sizes in airtight containers. Simply thaw and reheat for a quick, wholesome breakfast any day of the week!
Notes
BERRIES: Both fresh and frozen berries work beautifully in this recipe, and there’s no need to thaw frozen ones. Feel free to use any single berry type or a delicious combination. Other excellent fruit substitutions include banana chunks, chopped apples, pears, peaches, plums, nectarines, or even a delightful swap to chocolate chips! If you opt for very juicy fruits or frozen berries, consider reducing the almond milk by ¼ cup to prevent the oatmeal from becoming too watery.
WALNUTS: For the crunchy topping, pecans or almonds are fantastic alternatives that will provide a similar texture and flavor profile. If you have nut allergies, pumpkin seeds or sunflower seeds are excellent and safe choices.
Nutrition
Note
The nutrition calculations provided were performed using online tools. To ensure the most precise representation of the nutritional information for any recipe, it is recommended to calculate the nutritional details with the exact ingredients you personally use. You bear the ultimate responsibility for verifying that all nutritional information is accurate, complete, and relevant to your dietary needs.
There you have it – a wholesome, satisfying, and incredibly easy vegan baked oatmeal recipe that’s destined to become a staple in your kitchen. Whether you’re planning ahead for busy weekdays or want a comforting dish for a leisurely weekend, this berry-packed casserole delivers on all fronts: taste, nutrition, and convenience. Enjoy the simple pleasure of a truly good breakfast, made with love and designed for your well-being!