Oatmeal Protein Cookies

These oatmeal protein cookies are chewy, nutty, and lightly sweet — 11 grams of protein per cookie, one bowl, and ready in 25 minutes. The grab-and-go breakfast and post-workout snack you'll actually look forward to.

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For more high-protein oat recipes, check out my High-Protein Baked Oatmeal, Brownie Baked Oatmeal, Oatmeal Smoothie, and Pumpkin Baked Oatmeal.

I always keep a batch of these oatmeal protein cookies in the fridge — they're one of my go-to healthy snacks, a solid post-run refuel option, and the little guy absolutely demolishes them. Cookies that work for a three-year-old and a marathon runner are a rare and beautiful thing.

What makes these worth making on repeat is the combination of simplicity and nutrition. One bowl, no mixer, 25 minutes start to finish, and each cookie delivers 11 grams of protein from whole-food ingredients like oats, nut butter, seeds, and protein powder. They're tender and moist — not chalky or dry like a lot of protein baked goods — and endlessly customizable with whatever mix-ins you have on hand. Naturally gluten-free with certified GF oats, easily vegan, and dairy-free as written.

For more high-protein breakfast ideas: Raspberry Overnight Oats, Chocolate Protein Overnight Oats, and Oatmeal Pancakes.

Praise for Oatmeal Protein Cookies

Important Ingredients and Substitutions

Mashed banana — Use very ripe bananas with lots of brown spots. The riper they are, the sweeter and more flavorful the cookies taste — underripe bananas make them bland. About 1 large banana = ½ cup mashed.

Unsweetened applesauce — Adds moisture and helps bind the dough without eggs. Don't skip it.

Nut butter or seed butter — Natural, drippy peanut butter is the classic here and adds both richness and protein. Almond butter or cashew butter work just as well. For nut-free, sunflower seed butter is a great swap.

Protein powder — Vanilla or unflavored works best. Both whey and plant-based protein powders work, though plant-based versions can make the dough slightly drier — add an extra tablespoon or two of applesauce if needed.

Oats — Rolled oats give these oatmeal protein cookies their hearty, chewy texture. High-protein oats (like Bob's Red Mill—affiliate link) add about 3 extra grams of protein per serving if you can find them. Regular old-fashioned or quick oats work perfectly fine — just note the protein count will be closer to 8g per cookie.

Chia seeds and hemp hearts — These add protein, fiber, and omega-3s while helping bind the dough. Ground flaxseed is a good substitute for either. A flax egg (1 tablespoon ground flaxseed + 3 tablespoons water, rested 5 minutes) also works as a binding boost if your dough feels too loose.

Mix-ins — Keep total mix-ins to about 1 cup so the cookies hold together. Chocolate chips, raisins, dried cranberries, chopped walnuts, and coconut flakes are all great options.

Recipe Variations

These cookies are a great base — here are some easy ways to customize:

• Peanut Butter Chocolate Chip — Stick with peanut butter and load up on dark chocolate chips and chopped peanuts. This is the most dessert-adjacent version and 100% toddler-approved.
• Trail Mix Style — Swap the mix-ins for 1 cup of your favorite trail mix. You get crunch, sweetness, and texture in every bite with zero extra effort.
• Pumpkin Spice — Replace the mashed banana with pumpkin purée, swap cinnamon for pumpkin pie spice, and add an extra splash of maple syrup, or see my Pumpkin Oatmeal Cookies for a full fall take on this recipe.
• Crazy for Cashew — Cashew butter + chopped cashews + dried cranberries or golden raisins. Slightly sweeter and buttery-tasting.
• No Protein Powder — Skip the protein powder and add an extra ¼ cup of oat flour (blend rolled oats in a blender). The cookies stay hearty but drop to about 8g of protein per cookie.

How to Make Oatmeal Protein Cookies

For the complete recipe and measurements, scroll to the recipe card at the bottom of this post.

Prepare: Preheat the oven to 350°F and line two baking sheets with parchment paper.

Step 1: In a large bowl, stir together the mashed banana, peanut butter (or seed butter), maple syrup, and vanilla extract until smooth.

Step 2: Add the protein powder, oats, chia seeds, hemp hearts, cinnamon, and sea salt to the bowl.

Step 3: Stir until a thick, cohesive dough forms. Fold in your mix-ins.

Step 4: Use a ¼-cup measuring cup or large cookie scoop to portion the dough onto the prepared baking sheets, spacing about 1 inch apart. Gently press each mound down with a fork or your fingers to flatten slightly — these cookies won't spread in the oven.

Step 5: Bake for 15–17 minutes, until the cookies are set and lightly golden around the edges.

Step 6: Let cool on the baking sheet for at least 10 minutes, then transfer to a wire rack to cool completely. The texture firms up as they cool, so try to wait before digging in. (I know. It's hard.)

Chelsea's Recipe Pro-Tips

• Very ripe bananas only — Brown-spotted bananas are sweeter, softer, and make a noticeably better cookie. Pale yellow bananas will give you a bland, dry result. If yours aren't ripe yet, pop them in a 300°F oven for 15 minutes until the skin turns black — instant ripe banana.
• Expect a thick dough — This batter should be dense and slightly sticky, not pourable. That's exactly right. A thick dough is what gives these oatmeal protein cookies their hearty, chewy texture.
• Don't skip pressing them down — These cookies won't spread on their own, so pressing the tops flat before baking is the only way to get even thickness and a nicer final look.
• Pull them early — Take them out as soon as the edges look set and lightly golden. Overbaking dries them out and makes them crumbly. They'll look slightly underdone in the center — that's fine, they'll firm up as they cool.
• Let them cool completely — The texture improves a lot as they cool. Give them at least 10 minutes on the pan before eating. The flavor also deepens as they sit.
• Meal prep the smart way — This recipe makes 18 cookies and doubles easily. Freeze half and keep half in the fridge. You'll always have a grab-and-go protein snack ready without any extra effort.

Storage Directions

• Refrigerating: Store in an airtight container in the refrigerator for up to 7 days. They actually get better after a day or two as the flavors meld.

• Room temperature: Keep in an airtight container at room temperature for up to 4 days.

• Freezing: Freeze cooled cookies in an airtight, freezer-safe container for up to 3 months. Thaw at room temperature for 20–30 minutes, or microwave for 15–20 seconds.

Serving Suggestions

These oatmeal protein cookies are great on their own, but they really shine as part of a bigger breakfast or snack spread. Pair them with a Green Date Smoothie or Blueberry Spinach Smoothie for an energizing combo that doesn't require any cooking. For a bigger morning meal, add a Protein Coffee or a Matcha Protein Shake alongside — you'll be fueled well until lunchtime.

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4.64 from 38 votes

Oatmeal Protein Cookies (Easy Breakfast Cookie Recipe!)

Chelsea Plummer | Mae's Menu

These oatmeal protein cookies are chewy, nutty, and lightly sweet — made in one bowl with whole-food ingredients and packed with 11 grams of protein per cookie. Perfect for meal prep, post-workout snacking, or a grab-and-go breakfast.

Prep Time 10 minutes mins

Cook Time 15 minutes mins

Total Time 25 minutes mins

Course Breakfast

Cuisine American

Servings 18 cookies

Calories 263 kcal

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Equipment

• Vanilla protein powder
• High protein oats
• Measuring Cups & Spoons
• Mixing Bowls
• Silicone Spatula

Ingredients

  

1x2x3x

• ½ cup overripe mashed banana about 1 large banana
• 1 cup unsweetened applesauce
• ¾ cup natural peanut butter or almond, cashew, or sunflower seed butter
• 1 teaspoon pure vanilla extract
• ¼ cup pure maple syrup
• 1 teaspoon ground cinnamon
• large pinch salt
• ½ cup vanilla or unflavored protein powder
• 2 tablespoons chia seeds
• 2 tablespoons hemp seeds
• 2 ½ cups high-protein oats or rolled oats (see notes below for protein content)
• 1 cup mix-ins chocolate chips, raisins, chopped walnuts, dried cranberries, or trail mix

Instructions

 

• Preheat the oven to 350°F and line two baking sheets with parchment paper.
• In a large mixing bowl, stir together the mashed banana, applesauce, peanut butter, maple syrup, and vanilla until smooth.
• Add the protein powder, oats, chia seeds, hemp hearts, cinnamon, and sea salt. Stir until a thick, cohesive dough forms. Fold in your mix-ins.
• Use a ¼-cup measuring cup or large cookie scoop to portion the dough onto the prepared baking sheets, spacing about 1 inch apart. Gently press each mound down with a fork or your fingers to flatten slightly.
• Bake for 15–17 minutes, until set and lightly golden around the edges.
• Cool on the baking sheet for 10 minutes, then transfer to a wire rack to cool completely.

Notes

• Protein: 11g per cookie with high-protein oats; ~8g with regular rolled oats. Different mix-ins will also affect nutrition.
• No protein powder: substitute an extra ¼ cup oat flour (blend rolled oats until fine).
• Vegan: naturally vegan as written — just ensure your protein powder and mix-ins are plant-based. Add a flax egg (1 tbsp ground flaxseed + 3 tbsp water, rest 5 min) for extra binding if needed.
• Dairy-free & lactose-free: naturally dairy-free as written.
• Gluten-free: use certified gluten-free oats.
• Nut-free: swap peanut butter for sunflower seed butter.
• Storage: refrigerate in an airtight container for up to 7 days, or freeze for up to 3 months.
• High altitude: developed at 5,000 feet — no adjustments needed.

Nutrition

Serving: 1cookie (made with high-protein oats, chocolate chips, and raisins)Calories: 263kcalCarbohydrates: 38gProtein: 11gFat: 9gSaturated Fat: 2gPolyunsaturated Fat: 3gMonounsaturated Fat: 4gTrans Fat: 0.002gCholesterol: 5mgSodium: 56mgPotassium: 296mgFiber: 5gSugar: 6gVitamin A: 24IUVitamin C: 1mgCalcium: 52mgIron: 2mg

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