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Monster Cookie Bars

Monster Cookie Bars are loaded with oats, peanut butter, chocolate chips and m&m's! Plus, they have no flour in them and they bake in a cookie sheet so they're perfect for a crowd.

Course Dessert, Snack
Cuisine American
Keyword Monster Cookie Bars, Oatmeal Cookie Bars, Sheet Pan Cookies
Author Sunup to Sundown

Ingredients

  • 1/2 cup butter, softened 1 stick
  • 1 cup brown sugar packed
  • 1 cup granulated sugar
  • 1 1/2 cups creamy peanut butter not all-natural
  • 3 large eggs
  • 1 tbsp vanilla
  • 1 1/2 cups quick oats
  • 3 cups old-fashioned oats
  • 1 tsp baking soda
  • 1 1/2 cups mini m&m's
  • 1 cup mini chocolate chips

Instructions

  1. Heat oven to 350 degrees. Prepare a cookie sheet by lining with parchment paper, silpat liner, or spraying with cooking spray.

  2. In a large bowl or stand mixer, combine butter, brown sugar, granulated sugar, and peanut butter. Mix until fluffy and pale in color. About 1-2 minutes.

  3. Add the eggs and vanilla. Mix together.

  4. Add in the oats and baking soda. Mix until combined.

  5. Add in the m&m's and mini chocolate chips (reserve some for the top of the bars if you desire). Stir together with a wooden spoon or spatula until combined.

  6. Dump dough onto the cookie sheet and spread out. This will take several minutes, but it can be done. It helps if you dollop spoonfuls of the dough all over the cookie sheet (rather than one pile in the middle) and then spread it out. Sprinkle with reserved m&m's and chocolate chips (if desired). Press down slightly onto the dough.

  7. Bake for 17-20 minutes. The edges will be lightly browned and the middle will still look pale and underdone, but it will finish baking as it cools. Let it cool for at least one hour so the bars can firm up and come together. You do not want to over-bake these!