I love cookie bars. They are so fast and easy. These Reese’s Peanut Butter Bars are cookie bar heaven.

The packaged cookie mix makes a perfect base.

Stir in butter and an egg…

…and then add a little oatmeal.

Remove a little for the topping and press the rest into the bottom of the pan.

Then melt the chocolate chips, sweetened condensed milk and peanut butter together in a saucepan.

Spread over the cookie base.

Break the leftover cookie dough over the top. Cut the mini PB cups in half and spread them around.

Bake until the center is set, Let cool and cut up!



Reese's Peanut Butter Cookie Bars

All the chocolate and peanut butter you could want in a cookie bar! @mostdeliciouslife.com
Course cookies, Dessert, Party Food
Servings 8


  • 1 11.9 ounce Reese's Pieces Cookie Mix
  • 2 Tbsp butter, softened
  • 1 egg
  • ½ cup oatmeal *Old fashioned or quick
  • ¾ cup chocolate chips
  • ½ cup sweetened condensed milk
  • 3 Tbsp creamy peanut butter
  • 10-15 mini PB cups, cut in half


  • Preheat oven to 350°.
  • Prepare 8x8 baking dish. Line with foil and spray with baking spray OR line with parchment paper.
  • Pour cookie mix into bowl. Add butter and egg. Mix well.
  • Stir in oats. Remove about ⅔ cup of mixture and set aside.
  • Press remaining mixture into prepared baking dish.
  • To a saucepan add chocolate chips, sweetened condensed milk and peanut butter. Cook and stir over low heat until melted and well mixed.
  • Spread over cookie mixture.
  • Break remaining cookie dough over top. Place mini peanut butter cups on top.
  • Bake for 30-35 minutes.
  • Cool completely before cutting up. Cool on counter for 2 hours or ½ hour in the refrigerator.
  • Pull out of pan using the foil or parchment papre and cut into squares.
Keyword bar cookies, chocolate, peanut butter, peanut butter cups, Reeses