Go Back

monster cookies


  • 1/2 cup 1 stick unsalted butter, melted
  • 1 1/2 cup peanut butter not natural, crunchy or creamy...your choice
  • 1 cup light brown sugar
  • 1 cup white sugar
  • 3 large eggs
  • 1 tsp vanilla
  • 1 tsp corn syrup
  • 2 tsp baking soda
  • 1 tsp salt
  • 4 1/2 cups old fashioned rolled oats I have used quick oats and they also work just fine!
  • 1/2 cup all purpose flour
  • 3/4 cup semi-sweet chocolate chips
  • 3/4 cup butterscotch chips
  • 3/4 cup m&ms


  • Line 2 pans with parchment paper and set aside.
  • In large bowl with an electric mixer combine melted butter, peanut butter, brown sugar, and white sugar, and beat until well combined.
  • Add eggs one at a time, beating well between each addition.
  • Add vanilla, corn syrup, salt and baking soda and beat until combined.  
  • Mix in flour and oats until well combined.  
  • With wooden spoon or spatula, mix in chocolate chips, butterscotch chips, and m&ms.  Warning: you will get an arm workout doing this!
  • Let dough rest for 30 minutes...
  • Preheat oven to 350 degrees F.
  • Drop dough by 1/4 cup balls onto baking pans...these might seem big but they aren't called monster cookies for nothing!  
  • Flatten cookies slightly and top with a couple more M&M's if desired.  
  • Bake 14-15 minutes, until they are light golden brown. They will seem underdone but you do not want to overbake them! They will set up as they cool.
  • Let them cool on baking sheet for 10 minutes, then transfer to cooling rack to cool completely.
  • Serve and enjoy!
  • Store leftovers in airtight container. These also freeze well!