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Reese’s Peanut Butter Oatmeal Cookie Bars

Reese's Peanut Butter Oatmeal Cookie Bars are perfect for the peanut butter lover in your life! These easy oatmeal cookie bars are loaded with peanut butter and Reese's candy for the ultimate treat. This delicious recipe is perfect for an after school snack and makes enough for a party too. I wouldn't dream of serving them without ice cold milk - it's a must!
Course Dessert
Cuisine American
Keyword reese's peanut butter oatmeal cookie bars
Prep Time 10 minutes
Cook Time 30 minutes
Total Time 40 minutes
Servings 32 pieces
Calories 277kcal
Author Trish - Mom On Timeout


  • 1 1/2 sticks unsalted butter softened
  • 2 cups light brown sugar
  • 1/2 cup creamy peanut butter
  • 2 eggs room temperature
  • 1 tbsp vanilla
  • 2 cups flour
  • 1 cup old fashioned oats
  • 2 1/2 tsp baking powder
  • 1/4 tsp salt
  • 1 cup Reese's peanut butter baking chips
  • 2 cups Reese's minatures chopped or Reese's minis


  • Preheat oven to 350 degrees.
  • Line a 9x13 inch baking dish with parchment paper.
  • Cream butter and sugar together in a large mixing bowl. Add peanut butter and continue mixing.
  • Add eggs one at a time, mixing well after each egg. Add in vanilla.
  • Combine flour, oats, baking powder, and salt in a small mixing bowl.
  • Add the flour mixture slowly stirring until well combined.
  • Stir in the peanut butter chips.
  • Spread 2/3 of the dough on the bottom of the pan. Top with Reese's minis or chopped miniatures.
  • Drop the remaining dough on top by the teaspoon. It doesn't have to be perfect and it won't cover all the Reese's.
  • Bake for about 30 minutes. Let cool completely and then cut into bars.


Calories: 277kcal | Carbohydrates: 35g | Protein: 5g | Fat: 14g | Saturated Fat: 6g | Cholesterol: 24mg | Sodium: 120mg | Potassium: 167mg | Fiber: 2g | Sugar: 24g | Vitamin A: 157IU | Vitamin C: 1mg | Calcium: 49mg | Iron: 1mg