Easy 20-Minute Flourless Peanut Butter Oatmeal Cookies

I remember a hectic evening when I craved cookies but had no flour. Digging through my pantry, I found peanut butter and oats. That combo became these soft, chewy cookies. Now, they’re a go-to in my kitchen. You can whip them up quickly too.

Prep time: 10 minutes
Cook time: 10 minutes
Total time: 20 minutes
Servings: 12 cookies

These flourless peanut butter oatmeal cookies are soft with crisp edges. They’re perfect for gluten-free diets if you use certified gluten-free oats. No complicated steps, just simple ingredients for a fast treat.

Ingredients

• 1 cup natural peanut butter
• 1/2 cup brown sugar
• 1 large egg
• 1 teaspoon vanilla extract
• 1/4 teaspoon ground cinnamon
• 1/2 teaspoon baking soda
• 1 cup old-fashioned rolled oats
• 1/2 cup dark chocolate chips (optional)

Instructions

1. Preheat oven to 350°F. Line a baking sheet with parchment paper.
2. In a bowl, mix peanut butter and brown sugar until smooth.
3. Add egg, vanilla, and cinnamon. Stir until blended.
4. Mix in baking soda and oats until fully combined.
5. Fold in chocolate chips if using.
6. Scoop dough into 12 balls. Place on baking sheet and flatten slightly with a fork.
7. Bake for 10 minutes until edges are golden.
8. Cool on sheet for 5 minutes, then transfer to a wire rack.

Substitutions

• Swap peanut butter for almond butter for a milder flavor.
• Use maple syrup instead of brown sugar for natural sweetness. Add 1/4 cup more oats if dough is too wet.
• Replace egg with a flax egg: mix 1 tablespoon ground flaxseed with 3 tablespoons water, let sit 5 minutes.
• Use quick oats instead of rolled oats for a less chewy texture.

For another oat-based treat, check out our no-bake protein balls recipe.

Storage and Make-Ahead Tips

• Store cookies in an airtight container at room temperature for 3 days. They stay soft.
• Refrigerate for up to 1 week. Reheat in microwave for 10 seconds for a warm bite.
• Freeze baked cookies in a zip bag for up to 2 months. Thaw at room temperature.
• Make dough ahead and refrigerate for up to 2 days. Bake when ready.

Serving Suggestions

• Serve warm with a glass of milk for a cozy snack.
• Pair with sliced bananas for a quick breakfast.
• Pack in lunch boxes; they hold their shape well.
• Enjoy with coffee for a morning treat. The peanut butter complements it perfectly.

Try our make-ahead breakfast burritos for another easy breakfast idea.

Tips and Variations

• Use certified gluten-free oats for a true gluten-free cookie. Always check labels.
• Add chopped walnuts for extra crunch.
• For vegan cookies, use a flax egg and maple syrup. Choose dairy-free chocolate chips.
• Bake for 8 minutes for softer centers, but watch the edges.
• Swap chocolate chips for raisins for a fruity twist.
• Turn into energy bites: roll dough into balls and skip baking.

Learn more about oats’ health benefits from this Harvard Nutrition Source on oats.

Craving more chocolate? Try our easy fudgy brownies from scratch.

These cookies bring comfort without the fuss. Bake a batch today and enjoy a quick, delicious treat!