S’mores Monster Cookies – addictive peanut butter cookies loaded with oats, Rice Krispies, pecans, milk chocolate, and marshmallows! 

Happy National S’mores Day!

How are you celebrating?! Can I suggest my favorite Raspberry White Chocolate S’mores?

When it comes to cookies, I either like a plain, boring shortbread or something loaded with everything you have in the kitchen. No in between with me.

So for these S’mores Monster Cookies, I started with a peanut butter base and then added oats, Rice Krispies, pecans, chopped Hershey’s bars, and tiny marshmallows.

They’re delicious and everything I want in a cookie.

S’mores Monster Cookies
  • 1/2 cup 1 stick unsalted butter, at room temperature
  • 1 1/2 cups crunchy peanut butter
  • 1 cup granulated sugar
  • 1 cup packed brown sugar
  • 2 eggs
  • 1 teaspoon vanilla
  • 1 1/2 cups all-purpose flour
  • 1 teaspoon baking powder
  • 1/2 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 1/2 cups oats
  • 1 cup Rice Krispies cereal
  • 1/2 cup chopped pecans
  • 1 cup roughly chopped milk chocolate
  • 1 cup marshmallow bits
  1. Preheat oven to 350F. Line 2 baking sheets with parchment paper.
  2. In the bowl of a stand mixer fitted with a paddle attachment, cream butter, peanut butter, and sugars together until light and fluffy. Beat in eggs and vanilla.
  3. In a separate bowl, whisk together flour, baking powder, baking soda, and salt. Add this and the oats to the butter mixture and beat until just combined.
  4. Use a rubber spatula to fold in Rice Krispies, pecans, milk chocolate, and marshmallow bits.
  5. Drop by rounded tablespoonfuls onto the prepared baking sheet, pressing down slightly.
  6. Bake 10 - 12 minutes or until golden brown. Cool on baking sheet for a couple minutes befor t