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  • Writer's pictureGrace Grogan

Peanut Butter Banana Protein Oat Cake Bars

Updated: Sep 25, 2023

As a nutrition science student and athlete, I know that high protein options are a must! This helps support muscle growth/recovery, and helps keep you feeling full for longer! I randomly decided I wanted to bake something one day in my college dorm, so I threw almost all the ingredients together that I had on hand. This accidentally created a delicious, fluffy, healthy, moist, high protein snack! Needless to say- this recipe is too good to keep to myself! It only requires a few simple ingredients and one bowl to make! I hope you all enjoy making and sharing (or not) this recipe as much as I do! Enjoy your cake bars (and of course, the protein for some MUSCLE GAINS!!)

fresh baked chocolate chip oatmeal bars


• 100g rolled oats

• 32g (1/4 cup) PB2 or regular peanut butter

•2 tsp baking powder

•1 pinch salt

•2 ripe crushed bananas

• 1 tbsp mini chocolate chips

•2 scoops (60g) protein powder of choice

•2 tsp cinnamon

•1 tbsp sweetener of choice (optional)


  1. Preheat oven to 350 degrees Fahrenheit. In a medium bowl, combine crushed bananas and sweetener. Fold in rolled oats, protein powder, salt, cinnamon, and peanut butter.

  2. Add in baking powder last, making sure everything is well combined.

  3. Line an 8x8 pan with parchment paper. Spread batter evenly in the pan, paying special attention to the corners. Sprinkle chocolate chips on top evenly. Bake for 15-20 minutes, or until a toothpick comes out ALMOST clean when inserted.

  4. Cut into 9 pieces. Serve and enjoy!

Notes/helpful tips:

  • Make sure not to overtake this recipe, otherwise it will be spongey and dry.

  • Bake in the center or top rack of the oven.

  • Storage: For best results, freeze for up to 6 months, or store on the counter or fridge in an airtight container for up to 8 days!

  • About 115 calories and 10 grams of protein per serving!

  • For more recipes, content, and ideas, feel free to give me a follow on my Instagram page @graces_messy_kitchen, or my other socials like Pinterest, Facebook, and TikTok.

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