Peanut Butter Cookie Dough Brownie Bars

Peanut Butter Cookie Dough

Two of my favorite treats are brownies and cookie dough. So I figured… why not put them together? I brought them to a friends house and I told him he could take a few before we left and he took half the pan – they were THAT good! Ha Ha!

Serves: 24

Peanut Butter Cookie Dough Brownie Bars

45 minPrep Time

15 minCook Time

1 hrTotal Time

Save RecipeSave Recipe


  • 1 (19.5 ounce) Pillsbury Brownie Mix
  • 2/3 cup vegetable oil (as listed on box)
  • 1/4 cup water (as listed on box)
  • 2 eggs (as listed on box)
  • 6 Tablespoons peanut butter (divided)
  • 1/2 cup peanut butter
  • 1/4 cup salted butter, softened
  • 1/2 cup granulated sugar
  • 1 cup brown sugar
  • 1/3 cup milk
  • 1 Tablespoon vanilla extract
  • 2 cups all purpose flour
  • 2 cups Peanut Butter M&M's


  1. Cook your brownies according to directions on the box for a 9x13-inch pan.
  2. Once they are out of the oven, take 3 Tablespoons of peanut butter and gently spread it over your warm brownies. Let them sit and cool.
  3. With an electric mixer, cream the butter and 1/2 cup peanut butter until smooth.
  4. Add the sugar, brown sugar, milk and vanilla, and mix until smooth. Carefully add the flour, and continue to mix at low speed until fully combined.
  5. Spoon the cookie dough onto the cooled brownies and spread gently into an even layer.
  6. Sprinkle on all of the M & M's so they are spread out across all the brownies.
  7. Melt the last 3 Tablespoons of peanut butter in the microwave (about 30 seconds) and drizzle over your brownies.
  8. Cover and place in refrigerator until serving.

Peanut Butter Cookie Dough 2

Looking for more Peanut Butter Treats?
These are my favorite!
Perfect Peanut Butter Cookies
Reese’s Peanut Butter Poke Cake
Reese’s Peanut Butter Pretzel Bars
Peanut Butter Snowballs
No Bake Peanut Butter Cheesecake


Check out the NEW Six Sisters’ Cookbook!

With over 150 recipes, we have put together 52 menu plans to make meal time a lot easier.
You can order our book HERE on Amazon!

Print Friendly, PDF & Email

Comment on this Recipe

29 Responses to “Peanut Butter Cookie Dough Brownie Bars”

  1. Sharice
    These are delicious!! My mother-in-law made them for our dessert after Sunday dinner last week, and I basically inhaled my piece and then ate a second piece right after :) I took home some leftovers on Sunday, and I just barely ate another piece, on Thursday, so it's been several days but it still tastes awesome and isn't dry at all. I'm sure at some point I will make these myself, but for now I'm just grateful my Mother-in-law introduced me to them!! :)

Leave a Comment