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5 from 2 votes

The Ultimate Peanut Butter Cookies

These ULTIMATE Peanut Butter Cookies are outrageously decadent and delicious! A peanut butter pudding cookie is filled with Reese's Pieces and PB chips, then topped with a peanut butter frosting and PB cups.
Prep Time15 mins
Cook Time10 mins
Total Time25 mins
Course: Cookies, Dessert
Cuisine: American, Dessert
Servings: 20
Author: Hayley Parker, The Domestic Rebel


  • 1/2 cup butter softened to room temperature
  • 1/4 cup creamy peanut butter
  • 3/4 cup brown sugar
  • 1/4 cup sugar
  • 1 egg + 1 egg yolk
  • 1 tsp vanilla extract
  • 1 tsp baking soda
  • 1 (3.4 oz pkg) INSTANT vanilla pudding mix (just the dry mix)
  • 2 cups all-purpose flour
  • 3/4 cup Reese's Mini Pieces
  • 3/4 cup peanut butter chips
  • 3/4 cup butter softened to room temperature
  • 1/4 cup creamy peanut butter
  • 1 tsp vanilla extract
  • 2 cups powdered sugar
  • 2 cups chopped Reese's Mini Peanut Butter Cups


  • Preheat oven to 350 degrees F. Line 2 baking sheets with silicone liners or parchment paper and set aside.
  • In the bowl of a stand mixer, cream together the butter, peanut butter, brown sugar & sugar with the paddle attachment until creamy, about 1 minute. Add in the egg, egg yolk, and vanilla and beat to combine. Lastly, add in the baking soda, dry pudding mix and flour and beat until a soft dough has formed. Fold in the Reese's Mini Pieces and peanut butter chips.
  • Drop the dough into heaping Tablespoonfuls onto the baking sheets, about 1-2" apart. Bake for approx. 8-10 minutes, rotating the pans halfway through baking time to ensure even cooking. Once the cookies come out, gently press down on them slightly with the bottom of a drinking glass. Cool on the racks completely.
  • To make the frosting: in the bowl of a stand mixer, beat together the butter, peanut butter and vanilla until smooth, about 1 minute. Add in the powdered sugar one cup at a time, until frosting is spreadable and smooth.
  • Spread a heaping Tablespoonful or so (more or less to suit your tastes) of the frosting onto the cooled cookies. Top with a heaping Tablespoonful of chopped Reese's PB Cups.