These banana oatmeal bars are delicious and easy to make. Packed with bananas, pineapple, oatmeal, and finished off with a delicious glaze.

If you love cozy breakfasts, try Apple Cinnamon Pancakes or Peanut Butter Banana Overnight Oats.

Banana Oatmeal Bars

If you have ripe bananas laying around then you can make these banana oatmeal bars. They make a perfect quick breakfast or a sweet snack, and a great kid-friendly snack too!

Made with mostly pantry ingredients, these oatmeal bars are tender, chunky, and packed with sweet banana and pineapple flavor. Not to mention they are baked entirely in one pan. So all you have to do is slice and serve!

close up banana oatmeal bars recipe

Ingredients What You’ll Need

The ingredients for these oatmeal bars are pretty simple and basic. Here’s a quick rundown of what you’ll need:

  • eggs
  • brown sugar
  • buttermilk
  • avocado oil
  • vanilla extract
  • old-fashioned oats
  • all-purpose flour
  • whole wheat flour
  • baking powder
  • salt
  • ground cinnamon
  • crushed pineapple
  • bananas
  • confectioners sugar
  • lemon juice
ingredients for banana oatmeal bars


  • Brown sugar: Coconut sugar is a great alternative to brown sugar.
  • Buttermilk: Buttermilk is one of those ingredients that you either use often or not at all. I personally love buttermilk in pancakes and baked goods. However, regular milk or almond milk can be used instead.
  • Avocado oil: Substitute with any other neutral tasting oil.
  • Oats: I recommend old-fashioned oats for this recipe. Use certified gluten free oats if necessary.
  • Flour: You can substitute both – the all-purpose flour and whole wheat flour with equal amounts of white whole wheat flour. It will yield similar results without having to change the rest of the recipe. I have not tested the recipe with any gluten-free flour.

How to Make Banana Oatmeal Bars Recipe

In a large bowl, whisk together the eggs, sugar, buttermilk, oil, and vanilla.

wet ingredients in a bowl

In a separate bowl, combine the oats, flour, baking powder, salt, and cinnamon. Stir with a wooden spoon until mixed together.

dry ingredients in a bowl

Add the wet ingredients to the dry ingredients and stir to combine. Do not overmix.

bars recipe batter in a bowl

Add pineapple and bananas. Pour the batter into a greased 9X13 baking pan. Bake in a preheated 350F oven for 35-40 minutes. Cool on a wire rack.

oatmeal bars in a pan

While the cake cools, prepare the glaze by whisking together the confectioners’ sugar and lemon juice. Drizzle over cooled cake. Cut into 15 squares and serve.

glazed oatmeal bars in a baking pan

What Do They Taste Like?

They’re soft but maintain their bar shape when you’re biting into one with a dense/nutty flavor. The texture is chunky with plenty of banana and pineapple chunks in every bite.

I recommend storing these bars, covered, at room temperature for up to 3 days and thereafter refrigerate in an airtight container.

banana oatmeal breakfast bars

More Breakfast Oatmeal Recipes

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oatmeal bars with bananas

Banana Oatmeal Bars

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 5 from 3 reviews
  • Author: Katya
  • Prep Time: 15 mins
  • Cook Time: 40 mins
  • Total Time: 55 mins
  • Yield: 15 1x
  • Category: Breakfast
  • Method: Baked
  • Cuisine: American


These banana oatmeal bars are delicious and easy to make. Packed with bananas, pineapple, oatmeal, and finished off with a delicious glaze.


Units Scale
  • 3 large eggs
  • 3/4 brown sugar, packed
  • 1/3 cup buttermilk
  • 1/3 cup avocado oil
  • 1 1/2 tsp. vanilla extract
  • 1 1/2 cups old-fashioned oats
  • 1 cup all-purpose flour
  • 3/4 cup whole wheat flour
  • 1 Tbsp. baking powder (yes a tablespoon!)
  • 3/4 tsp. salt
  • 1 1/2 tsp. ground cinnamon
  • 2 (8 oz.) cans crushed pineapple (do not drain)
  • 3 small ripe bananas, chopped (about 2 cups)


  • 1/2 cup confectioners’ sugar
  • 1 1/2 Tbsp. fresh lemon juice


  1. Preheat the oven to 350 degrees F. Grease 9X13 baking pan and set it aside.
  2. Whisk eggs, brown sugar, buttermilk, oil, and vanilla in a medium bowl.
  3. Combine oats, both flours, baking powder, salt, and cinnamon in a large bowl. Add wet ingredients to the dry and stir until moistened. Do not over mix.
  4. Fold in pineapple and bananas. Pour into the prepared pan and bake for 35-40 minutes or until toothpick inserted in the center comes out clean.
  5. Transfer the cake in the pan to a wire rack to cool.
  6. While the cake cools, prepare the glaze. Combine the confectioners’ sugar and lemon juice in a small bowl, and whisk until smooth. Drizzle the cooled cake with the glaze. Cut into 15 squares and serve.


  • Substitutions: See post for a complete list of ingredient substitutions.
  • Storing the Bars: Keep bars covered at room temperature for up to 3 days, thereafter, refrigerate in an airtight container.


  • Serving Size:
  • Calories: 185
  • Sugar: 8.9 g
  • Sodium: 138 mg
  • Fat: 6.3 g
  • Carbohydrates: 27.8 g
  • Protein: 4.4 g
  • Cholesterol: 37.8 mg