Oatmeal Protein Cookies

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  • Prep Time

    15 mins

  • Cook Time

    15 mins

  • Total Time

    4 hrs 40 mins

  • Servings

    22 cookies

  • Calories

    150 kcal

  • Course

    Dessert

  • Cuisine

    American

Oatmeal Protein Cookies

These easy oatmeal protein cookies with banana and peanut butter deliver 10 grams of protein per 2 cookies. A delicious wholesome treat (or breakfast cookie!)

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Ingredients

Servings
  • ¾ cup mashed banana about 2 large
  • ½ cup peanut butter or other nut butter of choice or sunflower seed butter
  • 2 large eggs
  • 2 tablespoons pure maple syrup* or honey or light agave
  • 1 ½ teaspoons pure vanilla extract
  • 1 teaspoon baking soda
  • ½ teaspoon ground cinnamon
  • ¼ cup vanilla protein powder or swap oat flour
  • ¼ cup ground flaxseed meal
  • 2 tablespoons chia seeds
  • 1 cup rolled oats
  • ½ cup chopped toasted walnuts pepitas, or almonds
  • cup dark chocolate chip
  • ¼ cup reduced-sugar dried cranberries
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Instructions

  1. In a large bowl, whisk together the mashed banana, peanut butter, and eggs until smooth. Whisk in the vanilla and maple syrup.
  2. Sprinkle the baking soda, cinnamon, protein powder, flaxseed, and chia seeds over the top. Stir to combine.
  3. Fold in the oats, walnuts, chocolate chips, and cranberries. The batter will look very liquidy.
  4. Place the bowl in the refrigerator to chill and set for at least 4 hours, or for the thickest cookies, cover with plastic and refrigerate overnight.
  5. When ready to bake, place a rack in the center of your oven and preheat the oven to 375°F. Line a baking sheet with parchment paper or a silicone baking mat. With a large cookie scoop or spoon, portion the batter by 1/4 cupfuls onto the prepared cookie sheet. If needed, shape them lightly with your fingers so that they are round and very slightly flat on top.
  6. Bake for 9 to 12 minutes, until the cookies feel nearly set on the top and edges and a toothpick inserted into the center comes out clean (they will look underbaked but will set up more on the baking sheet). Let cool on the pan for 15 minutes, then transfer to a wire rack to finish cooling completely.

Notes

  • TO STORE: Store leftover cookies at room temperature for up to 1 week.
  • TO FREEZE: Freeze the cookies in an airtight container for up to 3 months.
  • *FOR SWEETER COOKIES: As written, these cookies are not super sweet. If you desire a sweeter cookie, add 1 tablespoon of additional maple syrup.
  • This recipe was updated in March 2025 - the original version called for 3/4 cup oatflour in place of the rolled oats, flaxseed, and protein powder. It also called for 1/4 cup raisins instead of chocolate chips. Feel free to play around! To make your own oat flour, pulse 3/4 cup oats in a food processor until they are well ground.
  • ***TIP: I found that 4 hours of refrigeration time was sufficient for the cookies to set and be thick and puffed like in the photos. Ben's mom found that she needed to chill them overnight or the cookies came out flat. The thickness may vary with your oven, but if you want to be 100% sure of having thick, puffy cookies, I'd suggest overnight refrigeration.

Nutrition Information

Show Details
Serving 1(of 22) Calories 150kcal (8%) Carbohydrates 16g (5%) Protein 5g (10%) Fat 8g (12%) Saturated Fat 2g (10%) Polyunsaturated Fat 3g Monounsaturated Fat 2g Trans Fat 0.003g Cholesterol 17mg (6%) Sodium 88mg (4%) Potassium 164mg (5%) Fiber 3g (12%) Sugar 5g (10%) Vitamin A 28IU (1%) Vitamin C 1mg (1%) Calcium 42mg (4%) Iron 1mg (6%)

Nutrition Facts

Serving: 22cookies

Amount Per Serving

Calories 150 kcal

% Daily Value*

Serving 1(of 22)
Calories 150kcal 8%
Carbohydrates 16g 5%
Protein 5g 10%
Fat 8g 12%
Saturated Fat 2g 10%
Polyunsaturated Fat 3g 18%
Monounsaturated Fat 2g 10%
Trans Fat 0.003g 0%
Cholesterol 17mg 6%
Sodium 88mg 4%
Potassium 164mg 3%
Fiber 3g 12%
Sugar 5g 10%
Vitamin A 28IU 1%
Vitamin C 1mg 1%
Calcium 42mg 4%
Iron 1mg 6%

* Percent Daily Values are based on a 2,000 calorie diet.

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