Peanut Butter Brownie Baked Oatmeal is a delightful fusion that marries creamy peanut butter with the rich, chocolatey essence of brownie. It’s unlike your typical breakfast—think of it as a warm hug on a chilly morning or a nostalgic treat that feels just like dessert. Preparing this dish in a simple 9 x 13 pan makes it easy to serve, perfect for busy breakfasts or a sweet snack.

When I first tried this recipe, I was amazed at how something so wholesome could taste so indulgent. The combination of overripe bananas, rich cocoa, and creamy peanut butter creates a moist, chewy texture that keeps you coming back for more. This is not only a satisfying meal but also an excellent way to use leftover bananas. You’ll want to whip this up for friends, family, or even just for yourself—trust me, it’s irresistible!
Table of Contents
Why You’ll Love This Recipe
- Simple & Quick: This recipe comes together in just about an hour, making breakfast a breeze.
- Irresistible Flavor: Each bite is a heavenly mix of peanut butter and chocolate that hits just the right notes.
- Eye-Catching Appeal: The inviting aroma while it bakes will have everyone gathering around, eager to dive in.
- Flexible Serving: It’s perfect for breakfast, snack time, or even dessert—whatever your heart desires!
- Diet-Friendly Options: With ingredients like almond milk and cocoa powder, you can enjoy this treat without guilt.

Ingredients You’ll Need
- 2 2/3 cups over ripe mashed bananas: These bananas not only sweeten the oatmeal but also lend a moist, dense texture. You can substitute with unsweetened applesauce if needed.
- 1/3 cup creamy peanut butter: Choose a natural, creamy variety for the best flavor. If you prefer crunchy peanut butter, feel free to swap!
- 1 cup chocolate almond milk: This adds an extra dose of chocolatey goodness. Regular almond milk or cow’s milk works too if you don’t have chocolate on hand.
- 1/4 cup maple syrup: A natural sweetener that complements the other flavors beautifully. If you’re out of maple syrup, honey or agave syrup can stand in well.
- 2 1/2 tsp vanilla extract: Adds a warm depth of flavor. Always opt for pure vanilla extract when possible for the best taste.
- 3 cups rolled oats: Old-fashioned rolled oats are perfect here as they hold their shape and give a lovely chewiness.
- 1/2 cup cocoa powder: Adds that deep, rich chocolate flavor we love. Be sure to use unsweetened cocoa powder for balanced sweetness.
- Mini vegan chocolate chips: These are optional but add a delightful touch of chocolate in every bite; use dark chocolate chips if you prefer.
How to Make Peanut Butter Brownie Baked Oatmeal
Preheat the oven: Begin by setting your oven to a cozy 350 degrees Fahrenheit. Meanwhile, get a 9 x 13 inch pan and spray it lightly with non-stick cooking spray—this will help everything come out clean later.
Mash the bananas: Grab those overripe bananas and mash them up until you have about 2 2/3 cups. The riper, the better! They’ll add natural sweetness and moisture to your baked oatmeal.
Combine the wet ingredients: In a large mixing bowl, combine your mashed bananas, 1/3 cup creamy peanut butter, 1 cup chocolate almond milk, 1/4 cup maple syrup, and 2 1/2 teaspoons vanilla extract. Mix everything together until well-blended.
Mix in dry ingredients: Add in the 3 cups of rolled oats and 1/2 cup cocoa powder to the wet mixture. Stir gently until everything is evenly combined. This step is crucial to make sure that each bite is packed with flavor.
Pour into pan: Pour your oatmeal mixture into the prepared pan. Use a spatula to spread it out evenly, making sure there are no dry bits hiding underneath.
Add chocolate chips: If you’re a chocolate lover (and who isn’t?), now’s the time to add mini vegan chocolate chips on top. Sprinkle as many or as few as you want to customize your treat.
Bake: Slide the pan into the preheated oven and let it bake for 30 minutes. It should be fragrant and bubbling around the edges at this point. Afterward, turn off the oven and let the oatmeal sit inside for an additional 20 minutes—this allows it to set perfectly.
Cool down: Once it’s done baking, remove the pan from the oven and let it cool completely. If you’re feeling extra indulgent, feel free to drizzle some melted peanut butter on top for a finishing touch.

Storing & Reheating
Store any leftover Peanut Butter Brownie Baked Oatmeal at room temperature for up to 3 days. For longer storage, keep it in the refrigerator in an airtight container for up to one week. If you want to freeze it, cut it into squares and wrap each piece in plastic wrap, then store in a freezer bag for up to three months. When you’re ready to enjoy, simply reheat in the microwave for about 30 seconds to a minute. The texture may change slightly after freezing, but a quick reheat will have it tasting fresh!
Chef’s Helpful Tips
- Avoid using bananas that aren’t ripe enough—overripe ones provide the best flavor and moisture.
- Make sure to mix the wet and dry ingredients thoroughly; this ensures no clumps of dry cocoa powder make it into the baked oatmeal.
- Letting the baked oatmeal rest in the oven is key for the perfect texture—it gives it a chance to set.
- Feel free to add nuts or seeds for an extra crunch!
- If you want to make this ahead, the mixture can be prepared the night before and baked fresh in the morning.
No breakfast feels quite as cozy as a warm bowl of Peanut Butter Brownie Baked Oatmeal. It’s a comforting dish that balances the richness of chocolate with wholesome oats and natural sweetness. Whether you enjoy it fresh out of the oven or as an on-the-go snack, it’s sure to be a favorite you’ll want to make again and again! Try out different mixes or toppings to customize it for your taste. Enjoy every last bite!
Recipe FAQs
Can I use steel-cut oats instead of rolled oats?
Steel-cut oats require a longer cooking time and won’t yield the same chewy texture as rolled oats. If you prefer steel-cut, consider cooking them ahead or using rolled oats for the best result.
How can I make this recipe gluten-free?
You can easily make this baked oatmeal gluten-free by ensuring that the rolled oats are certified gluten-free. This way, everyone can enjoy this delicious treat!
What if I don’t have chocolate almond milk?
No problem! You can use regular almond milk or any type of milk you have on hand. Just remember that regular milk will change the flavor slightly.
Can I add other toppings?
Absolutely! Feel free to play around with your favorite toppings. Nuts, dried fruits, or even a dollop of yogurt can elevate your meal. Enjoy creating your unique twist!
PrintMore Desserts Recipes
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- No-Bake Chocolate Cherry Bourbon Balls
Recipe Card

Peanut Butter Brownie Baked Oatmeal
- Prep Time: N/A
- Cook Time: 60 minutes
- Total Time: 0 hours
- Yield: 12 servings 1x
- Category: Desserts
- Method: Baking
- Cuisine: American
Description
This Peanut Butter Brownie Baked Oatmeal combines over ripe bananas, creamy peanut butter, and chocolate almond milk for a deliciously moist treat. Perfect for breakfast or a healthy snack!
Ingredients
- 2 2/3 cups over ripe mashed bananas
- 1/3 cup creamy peanut butter
- 1 cup chocolate almond milk
- 1/4 cup maple syrup
- 2 1/2 tsp vanilla extract
- 3 cups rolled oats
- 1/2 cup cocoa powder
- mini-vegan chocolate chips
Instructions
- Preheat the oven to 350 degrees F and spray a 9 x 13 pan with non-stick spray.
- Mash enough over ripe bananas to yield 2 2/3 cups.
- In a large bowl, combine the mashed bananas, peanut butter, chocolate almond milk, maple syrup, and vanilla extract. Mix until smooth.
- Add rolled oats and cocoa powder, combining everything well.
- Pour the mixture into the prepared pan and spread evenly.
- Sprinkle with your desired amount of mini vegan chocolate chips.
- Bake in the preheated oven for 30 minutes, then turn off the oven but leave the dish inside for an additional 20 minutes to finish cooking.
- Once cooled, optionally drizzle with melted creamy peanut butter.
Notes
Feel free to adjust the amount of vegan chocolate chips to suit your taste.
This dish can be served warm or refrigerated and enjoyed cold.
It’s a great make-ahead option for busy mornings.
Nutrition
- Serving Size: 1 square
- Calories: 180
- Sugar: 6g
- Sodium: 90mg
- Fat: 6g
- Saturated Fat: 1g
- Unsaturated Fat: 3g
- Trans Fat: 0g
- Carbohydrates: 30g
- Fiber: 4g
- Protein: 4g
- Cholesterol: 0mg

