Monster Cookies

These cookies leave me speechless. They are sooo good, beyond good, amazingly unbelievably good!! What can be better than peanut butter, m&m’s, and choco chips baked into a delicious morsel of heaven??

Monster Cookies Monster Cookies

The dough is really easy to work with. Oftentimes when I make cookies the dough is too sticky to deal with and then I add more flour, making them too tough and cakey. The proportions on this recipe are perfect and the oats and peanut butter create a perfectly soft and chewy texture. The cookies lasted about a week at our house and they were still as delicious on day 7 as day 1!

Monster Cookies Monster Cookies

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Monster Cookies

  • Author: Kitschen Cat
  • Yield: 5 dozen 1x


  • 1 cup (2 sticks) salted butter (affiliate), softened
  • 1 cup packed brown sugar (affiliate)
  • ½ cup white sugar
  • 1 ½ cups creamy peanut butter (affiliate)
  • 2 large eggs
  • 2 teaspoons vanilla (affiliate) extract
  • 1 teaspoon baking soda
  • 2 ½ cups all purpose flour
  • 1 cup quick cooking oats
  • 1 ½ cups M & M’s
  • 1 cup semi-sweet chocolate chips (affiliate)


  1. Preheat oven to 350 degrees. Line baking sheet with parchment paper.
  2. In large mixing bowl, cream butter and sugars until well combined.
  3. Add peanut butter, eggs, and vanilla. Beat until well mixed.
  4. Mix in flour and baking soda, but do not overmix. Fold in oats, m&m’s, and chocolate chips.
  5. Refrigerate dough for 30 minutes before baking if too soft to handle.
  6. Roll dough into 1 inch balls, bake for 9 minutes. When cookies come out of the oven, press down gently to flatten.
  7. Let cool on a wire baking rack.

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