Monster Cookie Bars

Marie Gill



☆☆☆☆☆ 0 votes

20 Min
15 Min


  • 1 stick
    butter, softened
  • 1 c
    brown sugar
  • 1 c
    white sugar
  • 1 1/2 c
    peanut butter
  • 3
  • 1 tsp
  • 2 tsp
    baking soda
  • 4 1/2 c
  • 1 c
    chocolate chips
  • 1 c
    plain m & m’s

How to Make Monster Cookie Bars


  1. Preheat oven to 350
    In your mixer, place the softened butter, brown sugar, white sugar, peanut butter, eggs, vanilla and baking soda. I prefer to use crunchy peanut butter.
  2. Mix together until creamy.
  3. Add the oatmeal, chocolate chips and M & M’s and stir by hand until well blended.
  4. Spread into a greased 10×15-inch pan. You can use a 9×13 pan for a bigger bar but my personal preference is the 10×15 “brownie” pan. It gives the bars a cookie-crisp edge and they bake quickly
  5. The recipe states to bake 14 minutes. I checked mine after 14 minutes and decided to leave them in another 4 minutes so I would recommend 18 minutes. They should be golden brown around the edges and the center should just be starting to turn light brown.
  6. Let bars cool before cutting. They are very soft and moist so they will cut better if they have had a chance to firm up.
    Note: There is no flour in this recipe.
  7. These are just like the original Monster Cookies, but much faster and easier.

Printable Recipe Card

About Monster Cookie Bars

Course/Dish: Other Snacks
Main Ingredient: Sugar
Regional Style: American

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