Oatmeal Peanut Butter Monster Cookies {Gluten Free}

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Oatmeal Peanut Butter Monster Cookies . . . loaded with chocolate chips, M&M’s, peanut butter, and oats, these cookies are absolutely incredible!

Monster Cookies with peanut butter, oats, and M&M's. An epic cookie recipe. #monstercookies #oatmealcookies #glutenfreecookies

It’s no secret that I love cookies. They are one of my very favorite things to make. I am always on the lookout for a great cookie recipe. I usually have frozen cookie dough balls in ziplock bags in the freezer so we can have fresh home baked cookies whenever the craving strikes. Mmm.

Recipe for perfect Monster Cookies. Makes a big batch of seriously amazing cookies! #monstercookies

I got this recipe for Monster Cookies several years ago and it remains a favorite. Every time I share these cookies with family or friends I get rave reviews. They are soft, chewy, and yummy.

How to make perfect Monster Cookies - naturally #glutenfree, but you would never guess. Everyone loves these cookies!

They are also good with butterscotch chips in them, but this version is our favorite. Kids love the M&M’s! You can even switch out colors of M&M’s and make them for just about any holiday.

Oatmeal peanut butter cookies with M&M's. The best monster cookies ever! #monstercookies #oatmealcookies

This recipe makes a huge, ginormous batch! If I’m not making them for a large group, I freeze them. I wrap a few together in plastic wrap and then store them in a large ziplock bag in the freezer. They are fantastic heated up in the microwave for a few seconds. Or eaten straight from the freezer. 😉

Soft and chewy monster oatmeal peanut butter cookies with chocolate chips and M&M's. #monstercookierecipe

Another bonus to these cookies is that they don’t call for any flour, so they are perfect for those who have gluten intolerance. My sister can’t eat gluten, so I try to make these yummy cookies whenever we have a family gathering.

Believe me, these cookies are so tasty no one will believe they are gluten free!

Oatmeal Peanut Butter Monster Cookies

Yield: 6-7 dozen

Oatmeal Peanut Butter Monster Cookies

Oatmeal Peanut Butter Monster Cookies


  • 1 cup butter or margarine, soft
  • 3 1/4 cups peanut butter
  • 2 1/3 cups brown sugar
  • 1 1/2 cups sugar
  • 1 1/2 tsp corn syrup or honey
  • 1 1/2 tsp vanilla
  • 4 tsp baking soda
  • 2 tsp salt
  • 6 eggs
  • 2-3 cups M&M's
  • 2-3 cups chocolate chips
  • 9 cups old fashioned oats
  • Notes:
  • -There is no mistake, these cookies have no flour.
  • -Instant oats don't work as well as regular, they make the cookies drier.


  • Cream butter, peanut butter, sugars, corn syrup, vanilla, soda, and salt in a large mixing bowl till very creamy, 2-3 minutes. Add the eggs and mix well.
  • Stir in M&M's, chocolate chips, and oats till well combined. (Dough will be fairly sticky.)
  • Drop dough by tablespoonfuls onto silicone lined or greased cookie sheets and bake at 350° for 9-10 minutes.
  • Notes

    -These cookies don't spread as much as traditional cookies, so you can flatten the dough a bit before baking.
    -I find that using old fashioned oats is best, the quick oats make a drier cookie.

    I love these products for making peanut butter cookies:  (affiliate links)

    Other family favorite cookie recipes:

    Old Fashioned Peanut Butter Cookies
    Roll and Press Sugar Cookies
    Pudding Chocolate Chip Cookies

    You can see all my cookie recipes HERE.

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