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+ servings
Skillet cookie with Reese's pieces with two spoons.

Peanut Butter Skillet Cookie

This Peanut Butter Skillet Cookie is a delectable soft and chewy dessert cookie crafted with wholesome gluten-free oat flour, peanut butter, coconut sugar, dairy-free chocolate in every bite. It's a giant peanut butter cookie packed with peanut butter, Reese's peanut butter candies and Reese's peanut butter cups making it a peanut butter lover's dream that's perfect for sharing!

Course Dessert
Cuisine American
Keyword cookie skillet recipe, cookie with Reeses, peanut butter cookie recipe
Prep Time 10 minutes
Cook Time 25 minutes
Total Time 35 minutes
Servings 14 servings
Calories 300 kcal
Author Kelly


  • 1 cup gluten-free oat flour , you can also use cassava flour, gluten-free 1-to-1 baking flour or all-purpose flour if you're not gluten-free
  • 1 teaspoon baking soda
  • 1/4 teaspoon salt
  • 1 1/4 cup gluten-free old fashioned oats
  • 3/4 cup vegan butter , melted. You can also use regular unsalted butter if you're not dairy-free
  • 1/2 cup coconut sugar , you can also use brown sugar or brown sugar substitute of your choice
  • 1/2 cup pure maple sugar , you can also use granulated cane sugar or granulated sugar substitute of your choice such as Lakanto monk fruit sweetener or Swerve
  • 2/3 cup creamy peanut butter , you can also sub with another nut butter or seed butter of your choice if preferred
  • 1 large egg , at room temperature. You can also use an egg substitute of your choice.
  • 1 teaspoon pure vanilla extract
  • 1/4 cup dairy-free chocolate chips , we like Pascha's Chocolate, Eating Evolved or Lily's Sweets. Feel free to use regular chocolate chips if you're not dairy-free.
  • 1/3 cup mini or regular Reese's pieces , optional. Feel free to use more chocolate chips or Sugar-Free Keto Chocolate Dots, Lily's Candy Coated Pieces or Keto Gemz for a sugar-free option, Unreal Dark Chocolate Gems for a vegan option or any other candy-coated chocolates of your choice.
  • 1/3 cup chopped peanut butter cups , optional. Feel free to leave out or use Lily's Sweets Peanut Butter Cups, Keto Cups for a lower sugar option or Sunbutter Cups as another substitute.


  1. Preheat oven to 350 F degrees.
  2. Lightly coat a 9 inch cast iron skillet or 9" round cake pan with cooking spray.
  3. In a large bowl, whisk together the flour, baking soda, and salt. Stir in the oats. Set aside.
  4. In another large bowl, whisk together the melted butter and both sugars until smooth. Add peanut butter and mix until incorporated. Whisk in the egg and vanilla until smooth and combined.
  5. Slowly stir in the dry ingredients to the wet ingredients and mix until just combined. Be careful not to over-mix.
  6. Fold in chocolate chips and half of the Reese's pieces (if using) and peanut butter cups (if using) - reserving the other half for topping.
  7. Gently press cookie dough into prepared skillet and top with reserved Reese's pieces and peanut butter cups evenly.
  8. Bake 22-27 minutes or until an inserted toothpick comes out clean.

    Serve warm, with dairy-free or regular vanilla ice cream.

Recipe Notes

Refrigeration: If you manage to resist devouring the entire Peanut Butter Cookie Skillet in one sitting, you can store it in an airtight container at room temperature for a few days.

Freezing: For longer storage, wrap it well and freeze for up to three months.

Reheating: Simply reheat in the oven or microwave when you're ready to indulge again.

Nutrition Facts
Peanut Butter Skillet Cookie
Amount Per Serving (1 serving (1/14 recipe))
Calories 300 Calories from Fat 162
% Daily Value*
Fat 18g28%
Carbohydrates 31g10%
Fiber 2g8%
Sugar 16g18%
Protein 6g12%
* Nutrition facts are provided as a courtesy using the WPRM recipe calculator. It is best to make your own calculations to ensure accuracy. We expressly disclaim any and all liability of any kind with respect to any act or omission wholly or in part in reliance on anything contained in this website. Percent Daily Values are based on a 2000 calorie diet.