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Home » Recipes » Breakfast Recipes

Cozy Blueberry Banana Baked Oatmeal Recipe

Modified: Feb 7, 2025 by Kori Butler · Published: Feb 9, 2025

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Start your mornings with this irresistible banana blueberry baked oatmeal with crunchy walnuts—a hassle-free way to enjoy a warm, wholesome breakfast you can eat on all week long! This recipe is packed with nutritious ingredients and comes together effortlessly. It's completely plant-based and vegan, with no eggs or dairy—just hearty oats, sweet bananas, juicy blueberries, warm cinnamon, creamy oat milk, and a touch of brown sugar.

Blueberry baked oatmeal in a white bowl with a spoon.Pin

You'll Love This Baked Oatmeal Vegan Version!

  • Delicious. Healthy can be delicious too! Warm and comforting oats with brown sugar, cinnamon, plump juicy blueberries and sweet bananas. Oh yeah.
  • Warm Breakfast. Instead of eating cold overnight oats - how about a hot breakfast? This makes 9 servings which you can warm and eat on all week long!
  • Healthy Baked Oatmeal. This banana blueberry baked oatmeal with walnuts is a nutrient-packed, plant-based breakfast loaded with fiber, antioxidants, and heart-healthy fats. Made with wholesome oats, flaxseed, fresh fruit, and oat milk, it supports digestion, boosts energy, and keeps you full for hours.

What You'll Need

Baked oatmeal vegan ingredients on a white wooden board.

Ingredients

  • Old Fashioned Oats.
  • Milk of choice. I used a creamy oat milk but you can use any milk you want.
  • Sugars. I chose a combination of granulated sugar and brown sugar, but I've also used agave and maple syrup instead of the brown sugar before.
  • Flax Eggs. This recipe is egg-free, but two eggs could be used in place of the ground flax and water.
  • Blueberries.
  • Walnuts.
  • Cinnamon.
  • Vanilla.
  • Baking Powder. This lightens up the oats so they're not as dense. Gluten free may be used.
  • Table salt.

For exact ingredient quantities, please see the recipe card below!

Substitutions and Variations

  • This is an egg-free recipe using flax "eggs" instead, but 2 eggs or ½ cup liquid egg whites can be substituted for the flax egg (2 tablespoons of ground flax seed meal and 6 tablespoons of water, mentioned in the ingredients above). If you use real egg, increase the milk by ¼ cup.
  • Dairy or plant-based milk may be used. The creamier it is the thicker the oats will be. I used creamy oat milk.
  • Maple syrup or agave may be substituted for the granulated sugar. 
  • A mixture of fresh berries, such as blackberries, raspberries, etc., may be used. I have not tested frozen berries; they could technically be used, but they will add to the moisture and increase baking time.
  • Any favorite nut can be substituted, but I like walnuts, pecans, or almonds. You could also omit the nuts altogether. 
A square baking dish and a white bowl served with baked oatmeal and blueberries.Pin

How To Make Baked Oatmeal and Blueberries

Follow these simple steps to make the best healthy baked oatmeal!

Printable recipe card below.

  1. Make the flax egg. Let it sit until gelatinous.
  2. Stir everything together.
  3. Pour into the baking dish and bake.
  4. Remove from the oven and sprinkle the brown sugar evenly over the top.
  5. Set oven to broil. Broil 4 inches from the heat until sugar dissolves, bubbles, and browns slightly.
  6. Remove the oats from the oven and let sit for about 10 minutes before serving. The oats will firm up as they sit.

How To Serve It

  • Serve warm with a drizzle of milk of choice.
  • Sweeten to taste with brown sugar, maple syrup.
  • Top with more nuts or fresh berries if desired.

If you're an oatmeal lover - be sure to try these delicious tiramisu overnight oats that will put a little pep in your step! You will love them!

Healthy baked oatmeal drizzled with maple syrup in a white bowl.Pin

Kori's Tips

  • You can double this recipe and bake in a 13 x 9" pan. Increase baking time as needed, approximately 10 more minutes.
  • If you use real egg, increase the milk by ¼ cup.
  • Adjust the sweetener to your desired tastes. I purposely kept it less sweet as it's nice to add more sugar or syrup over the top and let everyone customize it as they like it.

Storage and Reheating Tips

  • Leftovers. Store in the refrigerator, covered for up to 5 days.
  • Reheating. Reheat individual portions in a microwave until desired temperature is reached.

Be sure to save this pin to Pinterest for later!

Pinterest pin with baked oatmeal with blueberries.Pin

Can I ask you a favor?

If you tried this recipe, let me know! I'd love for you to come back and give the recipe a 5 star rating and leave a review in the comments! 🙂 Let's stay connected, so please follow me on Instagram, Facebook, and Pinterest! Subscribe to my newsletter to get healthy fresh recipe ideas every week!

📖 The recipe.

Blueberrry banana baked oatmeal in a white bowl with a bowl of blueberries in the background.

Banana Blueberry Baked Oatmeal

This banana blueberry baked oatmeal with walnuts is a wonderful hands-off way to make a really delicious, hot, healthy oatmeal breakfast with enough to eat on all week! It portions easily and warms up nicely. This recipe is plant-based and vegan, so there's no egg or dairy. Instead, healthy flaxseed is used, along with fresh fruit, cinnamon, brown sugar, oat milk, and a whole bunch of healthy oats!
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Author Kori Butler
Prep Time 10 minutes mins
Cook Time 55 minutes mins
Total Time 1 hour hr 5 minutes mins
Course Breakfast
Cuisine American
Servings 9
Calories 234 kcal

Ingredients
  

  • 3½ cups oat milk or other milk of choice (dairy or non-dairy)
  • ¼ cup granulated sugar (or 1½ to 2 tablespoons of maple syrup or agave nectar)
  • 2 tablespoons ground flax seed
  • 6 tablespoons water
  • 2 teaspoons vanilla extract
  • 2¼ cups old fashioned oats
  • 1 teaspoon ground cinnamon
  • 1 teaspoon baking powder (use gluten-free if needed)
  • ¼ teaspoon table salt
  • 1 large ripe banana (mashed)
  • 1 cup fresh blueberries or ½ cup dried
  • ⅓ cup chopped toasted walnuts (may be omitted; almonds or pecans may be substituted)
  • ¼ cup firmly packed brown sugar

Instructions
 

  • Preheat oven to 350º F. Grease an 8-inch square baking dish with nonstick spray.
  • In a small bowl, mix the flax meal and water. Let sit until it becomes gelatinous about 10 minutes.
  • In a large bowl, whisk together milk, sugar, vanilla, and the flax meal mixture.
  • Stir in oats, cinnamon, baking powder, salt, walnuts, and mashed banana. Gently stir in the berries.
  • Pour into the baking dish. Bake for 40 to 55 minutes or until the center jiggles only slightly. (Note that the outside will start to puff first, and then the inside will follow. At the point the inside is equally puffy, the center should then be just slightly jiggly, and that's when it's done.)
  • Remove from the oven and sprinkle the brown sugar evenly over the top of the oatmeal, spreading with a spoon to cover the surface.
  • Set oven to broil. Broil 4 inches from the heat until sugar bubbles and browns slightly, 1 to 2 minutes. (Watch carefully to prevent burning.)
  • Remove the oats from the oven and let sit for about 10 minutes before serving. The oats will firm up as they sit. Serve warm with a drizzle of milk of choice, sweeten to taste with additional brown sugar or maple syrup sprinkled over the top.

Video

Kori's Tips

For more helpful hints, substitution ideas, cooking tips, and other delicious recipes check out my post above.
TIPS: Use gluten-free oats if needed. Oats are naturally gluten-free, but the processing may add gluten, so the package needs to state gluten-free.
SUBSTITUTIONS:
  • This is an egg-free recipe using flax "eggs", but 2 eggs or ½ cup liquid egg whites can be substituted for the flax egg (2 tablespoons of ground flax seed meal and 6 tablespoons of water, mentioned in the ingredients above).
  • Dairy or plant-based milk may be used. The creamier it is, the thicker the oats will be. I used creamy oat milk.
  • Maple syrup or agave may be substituted for the granulated sugar. 
  • A mixture of fresh berries may be used. I have not tested frozen berries, they could technically be used but they will add to the moisture and increase baking time.
  • Any favorite nut can be substituted, but I like walnuts, pecans, or almonds. You could also omit the nuts altogether. 
SERVING SUGGESTIONS: Serve warm with a drizzle of milk of choice. Sweeten to taste with brown sugar or even maple syrup. Store leftovers in the fridge, heat individual servings in a microwave until warmed through. Re-moisten by pouring a little milk over the top. 

Nutrition

Calories: 234kcalCarbohydrates: 42gProtein: 5gFat: 6gSaturated Fat: 1gPolyunsaturated Fat: 3gMonounsaturated Fat: 1gSodium: 160mgPotassium: 229mgFiber: 4gSugar: 23gVitamin A: 211IUVitamin C: 3mgCalcium: 189mgIron: 2mg
DID YOU MAKE THIS RECIPE?Mention @seekinggoodeatsofficial or tag #seekinggoodeats! Be sure to subscribe to my newsletter to receive more healthy delicious recipes straight to your inbox.

© 2025 Seeking Good Eats™

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Hey there, I'm Kori.

I’m a culinary school trained chef specializing in holistic nutrition and wellness. I’ve always been a major foodie, and as I’ve aged, the full impact of my love of food—and not-necessarily-healthy eating habits—caught up to me. In an effort to make positive changes in my life (and hopefully yours, too), I created this website where I could share great-tasting, craveable, healthy recipes.

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