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Close up of moist peanut butter banana baked oatmeal showing creamy oat texture and peanut butter swirls.

Peanut Butter Banana Baked Oatmeal

Prep Time: 10 minutes
Cook Time: 30 minutes
Total Time: 40 minutes
Servings: 6 squares
Author: Nico Pallotta

  • 2 ripe bananas best if with brown spots
  • 2 cups (200 g) rolled oats
  • 1 cup (240 g) Greek yogurt full-fat or nonfat
  • ½ cup (120 g) milk any
  • ¼ cup (85 g) honey
  • ¼ cup (60 g) peanut butter we use 100% natural
  • 1 large egg
  • 1 teaspoon vanilla extract optional
  • 1 teaspoon cinnamon
  • 1 teaspoon baking powder

  • Mix Wet Ingredients: Preheat your oven to 375°F (190°C) and lightly grease an 8×8-inch (20×20 cm) baking dish.
    In a large bowl, mash 2 ripe bananas with a fork until mostly smooth (small lumps are okay).
    Add 1 cup Greek yogurt, ½ cup milk, ¼ cup honey, ¼ cup peanut butter (stir first), 1 large egg, and 1 teaspoon vanilla extract. Mix well until smooth and creamy.
    Step 1 Mashed bananas in bowl with whisked yogurt peanut butter and milk mixture.
  • Add Dry Ingredients: Add 2 cups rolled oats, 1 teaspoon cinnamon, 1 teaspoon baking powder, and a pinch of salt.
    Stir everything together until all the oats are coated and there are no dry spots.
    Step 2 rolled oats and cinnamon added to the wet ingredients.
  • Bake: Pour the mixture into your baking dish and spread it out evenly.
    Bake for 30–35 minutes at 375°F (190°C), until the top is lightly golden and the center feels set.
    Step 3 Oatmeal mixture spread evenly in baking dish before baking.
  • Cool & Serve: Let it cool for about 10 minutes before cutting.
    Serve warm or cooled. You can add yogurt, maple syrup, banana slices, or extra peanut butter on top if you like.
    Step 4 Freshly baked oatmeal in pan with golden top resting on marble surface.
Substitutions
  • Bananas → applesauce or mashed sweet potato
  • Rolled oats → quick oats (softer texture)
  • Greek yogurt → low-fat Greek yogurt, Skyr, or plant-based yogurt
  • Milk → any milk (almond, soy, oat, etc.)
  • Peanut butter → almond butter or sunflower seed butter
  • Honey → maple syrup or agave syrup
  • Egg → flax egg or chia egg (1 tbsp seeds + 3 tbsp water)
  • Vanilla extract → skip it or use almond extract
  • Cinnamon → pumpkin spice or nutmeg
  • Baking powder → no good substitute
 
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