Blackberry Oat Bake with Oats and Warm Berry Filling

Blackberry Oatmeal Bake is a simple, healthy, and satisfying breakfast that comes together in minutes. Made with ripe bananas, old-fashioned oats, fresh blackberries, nut butter, and pure maple syrup, this baked oatmeal is naturally sweet, high in fiber, and ideal for meal prep. It takes about 10 minutes to prepare and bakes into a soft, chewy dish the whole family will enjoy.

blackberry oatmeal bake

Easy, Healthy, & Delicious Meal Prep Breakfast

Oatmeal is one of those breakfasts that’s versatile and comforting. Baked oatmeal is especially convenient because you can make a batch once and enjoy portions all week. This Blackberry Oatmeal Bake is made in one bowl with wholesome ingredients—old-fashioned oats, mashed banana, nut butter, almond milk, maple syrup, and juicy blackberries. The result is a warm, lightly sweet breakfast that reheats beautifully and keeps well in the fridge for quick mornings.

baked blackberry oatmeal

Ingredients

This recipe uses simple pantry staples and fresh fruit. Adjust quantities to suit your taste or to make a larger batch for meal prep.

Ingredient Notes

  • Blackberries: Fresh blackberries add a tart, juicy contrast. Use 1/2 cup mixed into the batter and extra on top.
  • Mashed Banana: Ripe bananas provide natural sweetness and moisture—about 1 cup mashed (roughly 3 bananas).
  • Old-Fashioned Oats: Use 2 cups rolled oats for the best texture.
  • Almond Milk: Unsweetened vanilla almond milk works well; use about 1 1/3 cups.
  • Nut Butter: 1/4 cup peanut butter adds creaminess and healthy fats; swap for almond or cashew butter if preferred.
  • Pure Maple Syrup: 1/4 cup provides refined-sugar-free sweetness.
  • Baking Powder: 2 tsp helps the bake rise slightly and stay tender.
  • Vanilla Extract: 2 tsp for classic flavor.
  • Cinnamon & Salt: 1/2 tsp cinnamon and 1/4 tsp salt balance and deepen the flavors.
blackberry oatmeal bake ingredients

Substitutions & Additions

Customize this baked oatmeal to your preferences:

  • Oats: Quick oats may work but can change the texture.
  • Milk: Any milk—dairy, oat, soy, or coconut—can replace almond milk.
  • Berries: Swap blackberries for strawberries, raspberries, blueberries, or chopped stone fruit.
  • Nut Butter: Almond or cashew butter are great alternatives to peanut butter.
  • Mix-ins: Try shredded coconut, chopped nuts, dried fruit, or chocolate chips for variety.
mashed banana, almond milk, pure maple syrup, peanut butter, and vanilla extract in a large bowl

Kitchen Tools

Basic kitchen tools are all you need: measuring cups and spoons, a large mixing bowl, a spatula, and a greased baking dish. For individual servings, divide the batter into ramekins.

How To Make This Recipe

Prep time is short—about 10 minutes—then bake until set. Follow these clear steps for consistent results.

Step By Step Instructions

  1. Preheat the oven to 400°F (200°C).
  2. In a large bowl, combine the wet ingredients: 1 cup mashed banana (about 3 bananas), 1/4 cup nut butter, 1 1/3 cups unsweetened almond milk, 1/4 cup pure maple syrup, and 2 tsp vanilla extract.
  3. Whisk or stir until the mixture is smooth and well combined.
  4. Add the dry ingredients: 2 cups old-fashioned oats, 2 tsp baking powder, 1/2 tsp cinnamon, and 1/4 tsp salt. Stir to combine.
  5. Gently fold in 1/2 cup fresh blackberries.
  6. Transfer the mixture to a greased baking dish. Top with additional blackberries and a light sprinkle of cinnamon, if desired.
  7. Bake for 35–40 minutes, depending on dish size. The top should be set and slightly firm to the touch.
  8. Remove from the oven and let cool so the bake can set before cutting into squares.
  9. Serve warm with your favorite toppings—peanut butter, extra berries, Greek yogurt, a drizzle of honey, or a splash of milk.
baked oatmeal with blackberries after baking

Expert Tips

  • Use very ripe bananas for the best natural sweetness and moisture.
  • Grease the baking dish well to make serving and cleanup easier.
  • Allow the bake to cool fully before slicing so the squares hold together.
  • To make individual portions, divide the batter into ramekins and reduce baking time slightly as needed.
slice of blackberry oatmeal bake

Frequently Asked Questions

Can I use frozen blackberries?

Yes. Frozen blackberries should work; fold them into the batter as you would fresh berries. Be aware they may add more moisture, so baking time could vary slightly.

Is baked oatmeal healthy?

Baked oatmeal can be a healthy option. This recipe contains complex carbohydrates from oats, fiber from berries and bananas, and healthy fats from nut butter. It uses pure maple syrup rather than refined sugar.

Can I meal prep this recipe?

Absolutely. Store cooled slices in an airtight container in the refrigerator for up to 5–7 days. Reheat portions in the microwave or oven each morning.

Can I freeze this recipe?

Yes. Freeze individual slices in a freezer-safe bag or container for a couple of months. Thaw overnight in the fridge or reheat from frozen.

How should I serve this Blackberry Oatmeal Bake?

Serve warm with toppings like nut butter, extra fresh berries, Greek yogurt, honey, or a splash of milk. It also pairs well with a spoonful of yogurt for added creaminess and protein.

baked oatmeal with berries with a slice taken out

Ingredients (Quick Reference)

  • 1 cup mashed banana (about 3 ripe bananas)
  • 1/4 cup nut butter (peanut butter recommended)
  • 1 1/3 cup unsweetened almond milk
  • 1/4 cup pure maple syrup
  • 2 tsp vanilla extract
  • 2 cups old-fashioned oats
  • 2 tsp baking powder
  • 1/2 tsp cinnamon
  • 1/4 tsp salt
  • 1/2 cup fresh blackberries

Love this recipe?

If you try this Blackberry Oatmeal Bake, I’d love to hear how it turned out. Leave a comment and rating or share a photo to show your version. Enjoy a warm slice for breakfast or pack it for a convenient, nutritious meal on the go.

baked oatmeal in a large baking dish