Preheat oven: Set your oven to 375°F (190°C).
Mix dry ingredients: In an 8-inch square baking dish, stir together rolled oats, cinnamon, baking powder, and a pinch of salt.
1 ½ cup rolled oats, 1 teaspoon cinnamon, 1 teaspoon baking powder, ¼ teaspoon salt
Mash bananas and mix wet ingredients: In a bowl, mash bananas. Stir in 1 cup oat milk, flaxseed, peanut butter, agave, and vanilla extract.
2 ripe bananas, ¼ cup creamy peanut butter, 2 tablespoon blue agave syrup, 1 tablespoon ground flaxseed, 2 teaspoon pure vanilla extract, 1 cup pure oat milk
Combine: Pour the wet mixture into the dry oats in the baking dish. Stir everything to combine well.
Add chips (optional): Stir in peanut butter chips or sprinkle on top.
½ cup peanut chip
Bake: Bake for 30–35 minutes, or until the top is golden and the oatmeal is set.
Garnish and serve: Let cool slightly. Drizzle with more peanut butter and top with banana slices if you like.