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brown plate filled with protein bar squares

Peanut Butter Banana Protein Bars

  • Author: Whitney Carlson
  • Prep Time: 10 minutes
  • Cook Time: 25 minutes
  • Total Time: 35 minutes
  • Yield: 16 1x


  • 1 cup oat flour
  • 2 scoops of vanilla protein powder
  • 2 Tbsp nut butter (I used peanut butter)
  • 1 banana, mashed
  • 1/4 cup Stevia in the Raw
  • 1/2 tsp baking soda
  • 1/2 tsp baking powder
  • 1/4 tsp salt
  • 4 egg whites (or 3/4 cup liquid egg whites)
  • 1/2 cup water
  • 8 oz berry flavored baby food


  1. Preheat oven to 350 degrees
  2. Mash banana and set aside. Melt peanut butter, if needed, and set aside.
  3. Mix dry ingredients together in a large bowl
  4. Mix wet ingredients together in a medium size bowl (including banana and peanut butter)
  5. Add the ingredients from the small bowl into the large bowl and mix together
  6. Spray 8X8 dish (I use Pyrex) with non-stick spray and add batter to the dish
  7. Bake for 25-28 minutes


  • You MUST store these in the refrigerator or freezer as they will spoil because they have no preservatives!
  • Makes 16 squares. We normally eat 4 squares as a snack/meal.
  • Category: Snack
  • Method: Baked
  • Cuisine: American