Monster Cookie No-Bake Bars


  • Cookie Dough:
  • 1/2 cup butter , softened
  • 1/2 cup granulated sugar
  • 1/4 cup brown sugar
  • 1 cup creamy peanut butter
  • 1 tsp. vanilla
  • 1/2 cup flour
  • 2 cups old fashioned oats
  • 3/4 cup M&M's
  • Topping:
  • 8 oz (about 1 heaping cup) chocolate chips (I used about 1/4 cup semi-sweet and 3/4 cup milk chocolate)
  • 3 Tbsp. heavy whipping cream
  • 1/4 cup M&M's


  1. Line a 9x9-inch pan with parchment paper. Set aside
  2. In a medium size mixing bowl, mix the butter, granulated sugar and brown sugar. Add the peanut butter and vanilla and mix until well combined. Add the flour and mix just until the flour starts to incorporate. Slowly add the oats, 1 cup at a time. Carefully fold in the M&M's using a wood spoon or spatula. Evenly press the dough into the bottom of the prepared pan.
  3. To make the topping combined the chocolate chips and heavy cream in a medium-size microwave-safe bowl. Microwave in 30-second increments until the chocolate begins to melt. When the chocolate has melted, stir vigorously until it's smooth. Pour over the top of the cookie dough bars, spreading evenly. Sprinkle with the 1/4 cup M&M's. Once the ganache has cooled, put them in the fridge so the ganache can set up.
  4. When ready to cut, lift sides of parchment paper out of the pan and cut into bars. Store in fridge or at room temp.

Recipe Notes

I used half regular M&M's and half Peanut Butter M&M's in the cookie dough base and we loved it! Also, after melting the chocolate and stirring vigorously, I found my chocolate still clumpy and not smooth, I added a little bit more cream, and kept stirring and it finally went smooth and glossy. Just in case this happens to you, you'll know what to do to fix the problem.