Peanut Butter Banana Baked Oatmeal Recipe

I made this Peanut Butter Banana Bake that’s stupidly soft, perfectly sweet, packed with peanut butter flavor, and actually keeps you full until lunch so you won’t regret making it ahead.

I’m obsessed with this Peanut Butter Banana Bake because it tastes like dessert while actually being responsible. I love the gooey peanut butter punch and the banana sweetness that sneaks in without yelling.

It’s soft, loaded with oats, and somehow keeps me full until lunch. Whole Grain Breakfast Ideas don’t usually thrill me, but this one does.

I eat it straight from the pan sometimes, chocolate chips or chopped peanuts optional. But mostly it’s the mash of very ripe bananas with creamy peanut butter that hooks me.

Sorry not sorry. It’s simple, messy, and totally worth the craving every single morning.

Ingredients

• Rolled oats: hearty base, chewy texture, keeps you full for hours.
• Very ripe bananas: natural sweetness and moisture, basically the glue here.
• Creamy peanut butter: rich, nutty protein punch and comforting flavor.
• Pure maple syrup: mellow sweetness, it’s less processed than sugar.
• Eggs: bind everything together and add a little protein heft.
• Milk: makes it creamy, use any kind you like.
• Baking powder: gives a light lift, so it’s not dense.
• Fine sea salt: balances sweetness, makes flavors actually pop.
• Vanilla extract: warm scent and familiar cozy note.
• Ground cinnamon: comforting spice, a tiny warm hug.
• Melted butter or oil: adds richness and a smoother mouthfeel.
• Chopped peanuts optional: crunchy contrast and extra nut flavor.
• Chocolate chips optional: melty pockets of sweet, irresistible temptation.

Ingredient Quantities

• 2 cups rolled oats (gluten free if needed)
• 2 large very ripe bananas, mashed
• 1/2 cup creamy peanut butter
• 1/4 cup pure maple syrup (or honey)
• 2 large eggs
• 1 cup milk (dairy or any plant milk)
• 1 tsp baking powder
• 1/2 tsp fine sea salt
• 1 tsp vanilla extract
• 1/2 tsp ground cinnamon
• 2 tbsp melted butter or neutral oil
• 1/4 cup chopped peanuts or chocolate chips, optional

How to Make this

1. Preheat oven to 350°F (175°C) and grease an 8×8 inch or similar baking dish with a little melted butter or oil, or line it with parchment for easier removal.

2. In a large bowl mash the very ripe bananas until mostly smooth, a few small lumps are fine because they add texture.

3. Add the peanut butter, maple syrup (or honey), eggs, milk, vanilla, melted butter or oil, and stir until the mixture is well combined and a bit glossy.

4. In another bowl whisk together the rolled oats, baking powder, sea salt, and ground cinnamon so the leavening and spices are evenly distributed.

5. Pour the dry oats into the wet banana mixture and fold until just combined. Let it sit 5 minutes so the oats absorb some liquid; the batter will thicken.

6. If using, gently fold in chopped peanuts or chocolate chips, reserving a few to sprinkle on top for a nicer look and crunch.

7. Transfer the batter to the prepared dish, smooth the top with a spatula, and sprinkle the reserved mix-ins on top. Press them slightly into the batter so they dont burn on the surface.

8. Bake in the preheated oven for 25 to 35 minutes until the top is golden and the center is set; a toothpick should come out mostly clean with a few moist crumbs.

9. Cool at least 10 minutes before slicing so it firms up. Serve warm with extra peanut butter, sliced banana, yogurt, or a drizzle of maple syrup.

10. Store leftovers covered in the fridge up to 5 days, or freeze individual slices for quick breakfasts; reheat in the microwave or oven until warmed through.

Equipment Needed

1. 8×8 inch baking dish (or similar) lined with parchment or greased
2. Large mixing bowl
3. Small mixing bowl for dry ingredients
4. Fork or potato masher for mashing bananas
5. Whisk for dry ingredients and mixing eggs
6. Rubber spatula for folding and smoothing batter
7. Measuring cups and measuring spoons
8. Cooling rack (or a plate) to let the bars cool before slicing

FAQ

Peanut Butter Banana Baked Oatmeal Recipe Substitutions and Variations

• Eggs → Flax “eggs”: mix 2 tbsp ground flaxseed with 6 tbsp water, let sit 5 minutes then stir in. Works great for binding but the texture will be a tad denser.
• Peanut butter → Almond butter or sunflower seed butter: same amount, swaps flavor and is nut-free if you pick sunflower. Might be a little thinner so stir well.
• Milk → Any plant milk (oat, soy, almond) or even yogurt thinned with water: use 1 cup total. Oat milk keeps it creamy, almond is lighter, yogurt adds tang and makes it chewier.
• Maple syrup → Brown sugar or mashed apple/banana puree: use 1/4 cup brown sugar (or 1/3 cup applesauce) if you want less syrupy flavor. Applesauce makes it moister and slightly less sweet.

Pro Tips

1) Use super ripe bananas, like really brown spots. If theyre not sweet enough stir in a tablespoon or two more maple syrup, or mash one extra banana. For smoother bars pulse the oats a few times in a blender first, for chunkier texture leave them whole.

2) Warm the peanut butter a bit so it mixes easier, microwave 10-15 seconds. If your peanut butter is natural and oily, give it a quick stir first or the oil will separate the batter and make it greasy.

3) Don’t overbake. Check at 20 minutes and then every 5 minutes after, you want a few moist crumbs on the toothpick not bone dry. Let it cool at least 10 minutes before slicing or it will fall apart.

4) Add-ins: fold in chips or nuts gently and reserve some for the top so they look nice. If freezing, wrap individual slices tight in plastic and then foil, and thaw in the fridge overnight so texture stays better.