Name: Peanut Butter Baked Oatmeal
Prep time: 10 min
Cook time: 35 min
Total time: 45 min
Ingredients: 1 large spotty banana (mashed); ½ cup creamy all-natural peanut butter (one that is runny); 3 tbsp real maple syrup (or honey); 1 ¾ cups of unsweetened almond milk or oat milk; 1 large egg (or 1 tbsp ground flaxseed with 3 tbsp of warm water (for vegan option)); 2 tsp vanilla extract; 2 cups old-fashioned rolled oats ((200g)); 1 tsp ground cinnamon; 1 tsp baking powder; ½ tsp salt

This soft, fluffy peanut butter baked oatmeal is a deliciously healthy breakfast and so easy to make! Made with simple ingredients, it's perfect for meal prep and tastes just like peanut butter cake. A nutritious, refined sugar-free treat!

Easy peanut butter baked oatmeal recipe

Baked oatmeal is a staple in our home, and this peanut butter version is a favorite! If you love peanut butter like I do, you'll adore this recipe. We also love this Vegan Baked Oatmeal Recipe (15 Ways!) and Pumpkin Spice Latte Baked Oatmeal.

This baked oatmeal tastes like a warm peanut butter cake—soft, moist, and fluffy! You only need a handful of simple ingredients and one bowl to make it. Such an easy recipe!

We make this peanut butter baked oatmeal every week because it's perfect for meal prep. After baking, we cut it into squares for easy breakfasts or snacks throughout the week. Plus, any leftovers can be frozen for up to 3 months, ensuring a wholesome meal is always ready.

Best of all, it's secretly healthy, with no refined sugars! This recipe is vegan-friendly and naturally gluten-free, made with all-natural peanut butter, banana, and maple syrup. It's a guilt-free treat that will keep you satisfied for hours.

Why you'll love this recipe:

Peanut Butter Heaven: Perfect for peanut butter lovers!
Nutritious & Filling: Packed with oats, bananas, and peanut butter, this wholesome breakfast fuels your day and keeps you satisfied.
Healthy: Made without refined sugars or unnecessary ingredients.
Easy Prep: With simple ingredients and steps, it's a breeze for even beginner cooks.
Customizable & Versatile: Add your favorite toppings or mix-ins for endless flavor options. Enjoy it warm or cold, any time of day.
Make-Ahead & Family-Friendly: Prepare in advance for quick meals that the whole family, including kids, will love.
Try these protein chocolate chip baked oats or protein chocolate chip baked oats recipes next!

Ingredients needed

You only need eight simple ingredients to make this healthy peanut butter baked oatmeal! It's easy to prepare, nutritious, protein-packed, and perfect for meal prepping. Here's everything you'll need:

Banana: Adds natural sweetness and moisture and helps bind the oatmeal.
Peanut Butter: Use creamy, all-natural peanut butter without added sugars for rich flavor, protein, and healthy fats.
Maple Syrup or Honey: Both are excellent, refined sugar-free sweeteners.
Milk: You can use oats, cows, or almond milk to moisten the oats.
Egg: Acts as a binding agent and adds protein.
Vanilla Extract: Enhances the overall flavor.
Rolled Oats: Rich in fiber and nutrients, they make a healthy and filling choice. Use rolled oats, not quick oats or steel-cut oats.
Ground Cinnamon: Adds warmth and a hint of spice to complement the banana and peanut butter sweetness.

all ingredients in peanut butter baked oats in small bowls with labels

How to make peanut butter baked oatmeal

This peanut butter baked oatmeal recipe is super easy to make! Here are detailed step-by-step instructions so any level cook can whip it up. Just scroll to the bottom of this post for the full recipe and ingredient measurements.

Step One: Preheat your oven to 350°F (175°C). Lightly grease a 9-inch square dish with cooking spray or avocado oil.

Step Two: In a large bowl, combine the mashed banana, peanut butter, maple syrup, milk, egg (or skip it for a vegan option), and vanilla extract. Whisk until everything is well combined.

Step Three: Stir in the rolled oats, cinnamon, baking powder, salt, and ground flaxseed (if you're omitting the egg). Mix until all ingredients are nicely incorporated. TIP: Peanut butter brands vary, so make sure your batter isn't too stiff. If your peanut butter is thick, add a splash of milk. Check out the reference picture below for comparison!

rolled oats, salt, cinnamon, and baking powder in a mixing bowl

adding egg, milk, maple syrup, and peanut butter to rolled oats

Step Four: Pour the mixture into the greased baking dish, spreading it out evenly.

Step Five: Bake for 35 to 45 minutes until the top is golden brown and the center is set. Then, remove the pan from the oven with mits.

Step Six: Let the baked oatmeal cool for 5 minutes before serving. Drizzle with more peanut butter and garnish with banana slices for an extra treat.

Step Seven: Enjoy your delicious peanut butter baked oatmeal! Store any leftovers in an airtight container in the fridge for up to a week or freeze them for later. Reheat in the microwave for a quick breakfast!

unbaked peanut butter baked oats batter in a baking dish

baked peanut butter baked oatmeal in a baking dish

My top recipe tips:

The Batter: This batter is "wetter" than typical baked oatmeal recipes, resulting in a super moist, fluffy, and soft texture when baked. So don't worry if it seems a bit loose!
Banana Ripeness: Use a spotty, ripe banana for maximum sweetness and flavor in the baked oatmeal.
Peanut Butter Consistency: Choose an all-natural, creamy, runny peanut butter for a smooth texture. If your peanut butter is thick, gently heating it can make it easier to mix.
Customize Flavors: Feel free to experiment with add-ins like chocolate chips, chopped nuts, or dried fruit for added texture and flavor.
Make it Vegan: Substitute the egg with 1 tablespoon of ground flaxseed mixed with 3 tablespoons of water. Let the mixture sit for a few minutes until it thickens, then use it instead of the egg.
Make Ahead: Prepare the batter the night before and refrigerate it overnight. This lets the flavors meld and makes breakfast prep a breeze in the morning.
Double Batch: Consider doubling the recipe and freezing individual portions for quick and convenient breakfasts or snacks throughout the week.

peanut butter baked oatmeal with banana slices on top

Easy ingredient substitutions:

Here are some simple ingredient substitutions for the peanut butter baked oatmeal recipe. I recommend swapping only one or two ingredients at a time to keep the recipe intact.

Banana: If you don't have ripe bananas, unsweetened applesauce or pumpkin puree can replace them for moisture and sweetness.
Peanut Butter: You can use any nut or seed butter, like almond butter, cashew butter, or sunflower seed butter. Just make sure it's creamy and well-stirred.
Maple Syrup or Honey: Alternatives like agave syrup, brown rice syrup, or date syrup can provide similar sweetness levels.
Milk: Feel free to substitute almond milk or oat milk with any other milk alternative, such as soy milk, coconut milk, or cow's milk, depending on your dietary preferences.
Egg: For a vegan option, replace the egg with a flax egg (1 tablespoon ground flaxseed mixed with 3 tablespoons of water) or a chia egg (1 tablespoon chia seeds mixed with 3 tablespoons of water) for binding.
Rolled Oats: Quick oats can be used instead of rolled oats, but they may result in a slightly different texture.

What to serve with peanut butter baked oats:

There are many delicious options to serve with peanut butter baked oats. Here are a few ideas:

Fresh fruit
Chopped nuts or seeds (almonds, walnuts, chia, or flaxseed)
Yogurt (Greek or dairy-free)
Banana slices
Whipped cream (dairy-free or regular)
Maple syrup or honey
Additional peanut butter
Chocolate chips
Jam or jelly
Coconut flakes
Nut butter (extra peanut butter or other nut butters)

peanut butter baked oatmeal cut up into squares

Frequently Asked Questions

What can I use instead of bananas?

Unsweetened applesauce or pumpkin puree works well as a substitute for bananas.

Can I use quick oats for baked oatmeal?

You can use quick oats, but rolled oats are preferred for better texture and consistency. Rolled oats hold their shape better during baking, resulting in a chewier texture, while quick oats may lead to a softer and mushier final product.

Can I use crunchy peanut butter instead of creamy?

Yes, you can use crunchy peanut butter if you prefer some added texture in your baked oatmeal. Creamy peanut butter is recommended for a smoother texture, but both work well.

How do I know when the baked oatmeal is done?

The baked oatmeal is done when the top is golden brown, and the center is set. You can also insert a toothpick into the center; the oatmeal is ready if it comes out clean.

Can I add other mix-ins?

Absolutely! Feel free to add chocolate chips, nuts, or dried fruit to customize your baked oats.

Can I freeze baked oatmeal?

Yes! You can freeze individual portions for up to 3 months. Just thaw and reheat in the microwave.

How to store and reheat peanut butter baked oatmeal:

Storing: Allow the baked oatmeal to cool completely after baking. Transfer any leftovers to an airtight container, sealing it well to prevent moisture. Store in the refrigerator for up to 3-4 days.

Reheating: Place individual portions in the microwave on high for 1-2 minutes until heated through. For larger portions, reheat in the oven at 350°F (175°C) for 10-15 minutes, covering with foil to prevent drying out.

If you love this recipe, try these baked oatmeal recipes next!

Did you make this recipe?

If you make this recipe, be sure to comment and rate it down below. Also, don't forget to tag me @healthfulblondie on Instagram and use the hashtag #healthfulblondie so I can see your delicious creation and share it with my followers!

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