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Delicious Gluten-Free Banana Baked Oatmeal Recipe

Banana Walnut Baked Oatmeal

This banana bread baked oatmeal is a cozy breakfast casserole packed with ripe bananas, hearty oats, and crunchy walnuts. Perfect for make-ahead mornings, it's easy to make, customizable, and fits into gluten-free or dairy-free diets with a few simple swaps.
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Prep Time 10 minutes
Cook Time 45 minutes
Total Time 55 minutes
Servings 8

Ingredients
  

  • ½ cup brown sugar packed
  • ½ teaspoon salt
  • 1 teaspoon baking powder
  • 1 teaspoon ground cinnamon
  • 1 ½ cups over-ripe bananas mashed
  • 2 eggs
  • ½ teaspoon vanilla extract
  • 2 ½ cups old-fashioned oats not quick oats or steel-cut
  • 2 cups milk
  • 1 cup chopped walnuts divided

Instructions
 

  • Preheat and prep: Set your oven to 350°F. Lightly grease or spray a 2-quart (8x8 or similar) baking dish with non-stick spray.
  • Mix dry ingredients: In your big mixing bowl, use a fork to combine the brown sugar, salt, baking powder, and cinnamon.
  • Add wet ingredients: Mash the bananas if you haven’t yet done so. Then stir them in with the eggs and vanilla extract. There will be a few lumps.
  • Add oats and milk: Pour in the oats, milk, and ¾ cup of the chopped walnuts. Stir until combined.
  • Assemble: Pour the mixture into your greased baking dish. Sprinkle the top with the remaining ¼ cup of walnuts. Cover the dish tightly with foil.
  • Bake: Slide the pan into the center of the oven. Bake for 30 minutes. Then remove the foil and bake for another 10 minutes, or until the top is golden brown.
  • Serve: If adding to a bowl with a cream top, this can be spooned out warm. Or wait until room temp and cut into bars.
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