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Giant Monster Cookies

Who can resist gigantic monster cookies chock-full of goodies like chocolate chips, M&M's and peanut butter? If your appetite isn't quite monster-size, make them by heaping tablespoonfuls. This is the world's best monster cookies recipe. —Judy Fredenberg, Missoula, Montana
  • Total Time
    Prep: 20 min. + chilling Bake: 15 min./batch
  • Makes
    about 2-1/2 dozen


  • 2 cups creamy peanut butter
  • 2/3 cup butter, softened
  • 1-1/3 cups sugar
  • 1-1/3 cups packed brown sugar
  • 4 large eggs
  • 2-1/2 teaspoons baking soda
  • 1 teaspoon vanilla extract
  • 1 teaspoon light corn syrup
  • 6 cups old-fashioned oats
  • 1 cup semisweet chocolate chips
  • 1 cup milk chocolate M&M's


  • In a large bowl, cream peanut butter, butter, sugar and brown sugar until light and fluffy, about 4 minutes. Beat in eggs, baking soda, vanilla and corn syrup. Add oats and mix well. Stir in chocolate chips and M&M's. Cover and refrigerate 1 hour.
  • Preheat oven to 350°. Drop by 1/4 cupfuls 3 in. apart onto ungreased baking sheets. Bake 14-18 minutes or until edges are lightly browned. Cool 5 minutes before removing from pans to wire racks to cool completely. Store in an airtight container.

Test Kitchen Tips
  • Corn syrup is an invert sugar, meaning it is liquid in its natural state. This quality helps it stop sugar crystals from forming in frostings, candies and other sweet recipes.
  • Dark brown sugar contains more molasses than light or golden brown sugar. The types are generally interchangeable in recipes. But if you prefer a bolder flavor, choose dark brown sugar.
  • Check out our top 10 best cookie recipes.
  • Every editorial product is independently selected, though we may be compensated or receive an affiliate commission if you buy something through our links.

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    • Gramma Amy
      Dec 30, 2020

      Really good cookie. Chewy texture, and can add different combinations of to the dough besides M & Ms. We like that this cookie has no flour. We make these often, and every one has loved them.

    • Tena M.
      May 18, 2020

      I really like this recipe turned out wonderful was wondering if you had the full recipe that your mother gave you 35 years ago that is the one I lost and in trying to find but I can't remember the whole thing

    • Amy
      Jan 23, 2020

      Great tasting cookies! My attempt made more than expected. I had a little bit of a trouble keeping them together, and had to shape them with my hands after spooning them up with a 4T spoon.

    • dbqbetty
      Nov 27, 2019

      These cookies are a real hit with my family and friends. I like using crunchy peanut butter. Consider this one of my best cookie recipes . Notice that it contains no flour.

    • Margie
      Aug 23, 2019

      Can anyone tell me when you freeze them after cooked.. then thaw they lose moisture or have a different texture. Planning for an event and the make ahead and freeze would be so great

    • 2124arizona
      Jul 14, 2019

      Can you believe that we triple this recipe! That way they're enough cookies to go around for all the kids little and big. These make wonderful gifts for the holidays!!

    • spotteddog
      Dec 19, 2017

      These are amazing cookies! I used chunky peanut butter instead of creamy and added 1 cup of Kraft Caramel Bits for extra chew. Yum!

    • kkrausern
      May 27, 2017

      bought a fundraiser container of monster cookie dough and the hubbie stated it was awful. i found this recipe and had all ingredients on hand. just taking the last pan out of the oven now and i just threw away the rest of the awful tub of dough from the fundraiser. these are EXCELLENT!! hubbie likes them crispy so i baked them a few minutes longer for him. i like mine chewy and the baking time is spot on. tasty, not crumbly, easy dough to work with after the chilling time. thinking of making ice cream sandwiches with them for a summer treat.

    • meaganteal
      Mar 14, 2017

      very filling cookies!! You can do so much with these, by adding different ingredients.

    • Janet
      Mar 13, 2017

      These are soooo good. Followed the recipe exactly EXCEPT one of the grand kids does not like raisins. I used chopped dates. Used baking M&M's., and a mixture of milk choc and dark choc chips. They were gone so fast. Made them for the nursing home for the residents and they loved them. I have a propane stove and it took a tad longer to bake. After 6 minutes reversed the tray front to back and baked for an aditional 6 to 8 minutes. Came out soft in the center and light brown on the edges. Used a large scoop as I thought using a measuring cup slower.