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Overhead shot of stacked peanut butter cookie bars
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5 from 1 vote

Triple Threat Peanut Butter Cookie Bars

These Triple Threat Peanut Butter Cookie Bars are the BEST bar cookie recipe! Peanut butter cookies, peanut butter chips, Butterfingers, and chocolate! Everyone loved these!
Prep Time20 minutes
Cook Time25 minutes
Total Time45 minutes
Course: Dessert
Cuisine: American
Servings: 24 bars
Calories: 258kcal
Author: Dorothy Kern
Cost: $8


  • ½ cup (113g) unsalted butter , softened
  • ¾ cup (200g) peanut butter (creamy or crunchy, use a no-stir brand)
  • 1 cup (200g) packed brown sugar
  • 1 large egg
  • 1 teaspoon vanilla extract
  • 1 tablespoon milk
  • ¼ teaspoon salt
  • 1 teaspoon baking soda
  • 1 ½ cups all purpose flour
  • 1 cup peanut butter chips
  • 1 cup chopped Butterfingers pieces
  • 1 cup chocolate chips


  • Preheat oven to 350°F. Line a 9x13” pan with foil and spray with nonstick cooking spray.
  • Beat butter and peanut butter until smooth with a hand or a stand mixer (fitted with the paddle attachment). Add brown sugar and cream until smooth. Mix in egg, vanilla, milk, salt, and baking soda. Slowly stir in flour until combined, then add both chips and candy pieces. Stir until combined.
  • Press the dough into the prepared pan. Sprinkle with more chips and Butterfingers pieces, if desired. Bake for 20-25 minutes, or until the edges are golden brown. Cool completely before slicing into bars.
  • Store in an airtight container for up to 3 days or freeze for up to one month.


Make LOADED Peanut Butter Cookie Bars: use up to 3 cups of any kind of mix-ins you like!
  • Chips: chocolate, white chocolate, butterscotch, toffee bits
  • Nuts
  • Chopped Candy Bars
  • Chopped Oreos


Serving: 1serving | Calories: 258kcal | Carbohydrates: 31g | Protein: 5g | Fat: 13g | Saturated Fat: 7g | Trans Fat: 1g | Cholesterol: 20mg | Sodium: 149mg | Potassium: 94mg | Fiber: 1g | Sugar: 21g | Vitamin A: 146IU | Vitamin C: 1mg | Calcium: 27mg | Iron: 1mg