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Home » Cookies

Gluten-Free Monster Cookies

Jan 7, 2025 · Leave a Comment

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Gluten-free monster cookies are filled with good things: peanut butter, oats, butterscotch chips, and M&Ms. Everything comes together to make a cookie that’s chewy and flavorful. And the best part? The recipe is easy-to-make. You mix the dough in a large bowl. Scoop it onto a parchment-lined baking sheet and bake until brown. 

If you love gluten-free cookies, try these recipes for gluten-free chocolate chip cookies and gluten-free shortbread.

Gluten-free monster cookies on a wire rack.

What are Monster Cookies? 

Gluten-free monster cookies could be called “this and that” cookies because you add a little of this and a little of that.  The recipe starts with a peanut butter and oatmeal cookie base. Then you add butterscotch chips, peanuts, and M&Ms. But think of those as suggestions. Stir in your favorite nuts and candies to make monster cookies that suit your tastes.

Key Ingredients

Gluten-free monster cookie ingredients on the counter.
  • Gluten-Free Oats. Look for oats that are labeled gluten-free. Quick-cook (instant) and traditional oats work in this recipe. Traditional oats give you a chewier texture than quick-cook oats but both have good flavor. Don’t use steel cut oats.
  • Gluten-Free Flour. Use a gluten-free flour blend that contains xanthan gum. It helps the cookies hold their shape. The recipe was tested with Bob’s Red Mill’s 1:1 Gluten-Free Baking Flour. Different gluten-free flours affect the texture of the cookies. 
  • Peanut Butter. Creamy peanut butter works best. 
  • Butterscotch Chips. If you don’t like butterscotch chips, replace them with white chocolate chips, peanut butter chips, or chocolate chips. Note: For a long time, some brands of butterscotch chips contained barley. Read the label to ensure the butterscotch chips are gluten-free.
  • Peanuts. Use any type of peanut you love. Honey-roasted peanuts are especially nice. 
  • M&Ms. M&Ms or other chocolates are a nice addition.

Suggest Stir-In Variations

Mix it up by using different stir-ins. Here a few of my favorites.

  • Gluten-Free Pretzels. I like to break them up. Or you can press a mini-pretzel into the top of the cookie.
  • Potato Chips.
  • Toffee Chips

How to Make Gluten-Free Monster Cookies

Steps for mixing gluten-free monster cookie dough. 1. Melted butter, brown sugar, and peanut butter mixed in a bowl. 2. Adding gluten-free flour, baking soda, and salt. 3. Gluten-free oats sitting on top of the dough. 4. Adding butterscotch chips, peanuts, and M&Ms.
  1. Mix the melted butter, brown sugar, and peanut butter. Then add the eggs and vanilla extract. I like to use a large bowl for this.
  2. Stir in the gluten-free flour, baking soda, and salt. 
  3. Add the gluten-free oats.
  4. Stir in the butterscotch chips, peanuts, and candy pieces. 
Gluten-free monster cookies on a sheet pan. (left) Dough close up. (right) 12 cookies on a pan.
  1. Scoop dough into balls and place on a parchment-lined baking sheet. Bake until the edges are golden brown.
Stack of three gluten-free monster cookies. The top cookie is broken in half.

How to Store Leftovers

These cookies keep really well for about 5 days. Store the cooled cookies in an airtight container with a lid. 

If you want to keep them longer, place the cooled cookies into a freezer bag or container. Freeze for up to three months.

Gluten-free monster cookies on a wire rack.
Print

Gluten-Free Monster Cookies

Gluten-free monster cookies are loaded with good things! Gluten-free oats, peanut butter, butterscotch chips, and more. They bake up chewy and flavorful.

Prep Time 10 minutes
Cook Time 15 minutes
Total Time 25 minutes
Servings 24 cookies

Ingredients

  • ½ cup butter, melted and cooled slightly (4 ounces; 113 grams)
  • ¾ cup light brown sugar (6 ounces; 170 grams)
  • ¾ cup creamy peanut butter, see note 1 (7 ounces; 198 grams)
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • ¾ cup gluten-free flour, see note 2 (3 ¾ ounces; 106 grams)
  • ½ teaspoon baking soda
  • ½ teaspoon salt
  • 1 ¼ cups gluten-free oats, quick cook or rolled, uncooked, see note 3 (5 ¼ ounces; 148 grams)
  • 1 cup gluten-free butterscotch chips or chocolate chips (about 6 ounces; 170 grams)
  • 1 cup dry roasted peanuts ( 5 ounces; 142 grams)
  • 1 cup M&Ms candy (about 4 ounces; 113 grams)

Instructions

  1. Preheat oven to 350°F. Line a baking sheet with parchment paper.

  2. In a large bowl, whisk together melted butter, brown sugar, and peanut butter until smooth. Add eggs and vanilla extract. Mix until eggs are combined and the mixture is smooth. Switch to a rubber spatula or wooden spoon.

  3. Add the gluten-free flour, baking soda, and salt. Mix until flour is combined. Add the oats. Stir until combined. The dough will be thick

    Stir in butterscotch chips, peanuts, and candy pieces.

  4. Scoop dough, about two tablespoons each, onto the prepared baking sheet. Space the cookies about one-inch apart. If desired, flatten each cookie with the bottom of a glass or measuring cup. Dip the bottom of the measuring cup in cold water to keep it from sticking to the dough.

  5. Bake until the edges are golden brown and set, about 12 minutes. Allow cookies to cool on the pan for about three minutes and then transfer cookies to a wire rack. Repeat with remaining dough.

  6. Place cookies in an airtight container and store on the counter for up to four days or freeze in a freezer container, for up to three months. Allow cookies to thaw on the counter.

Recipe Notes

Note 1: Creamy Peanut Butter: Traditional creamy peanut butter works best.

Note 2: Gluten-Free Flour: This recipe was tested with Bob’s Red Mill 1:1 Gluten-Free Flour Blend and is recommended for the best texture. 

Note 3: Oats: Use gluten-free oats. Quick cook (instant) oats or old fashioned oats may be used. Do not use steel cut oats in this recipe.

 

 

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Elizabeth Barbone

I'm Elizabeth. Welcome to GlutenFreeBaking.com --- a judgment-free baking space. Here you'll find easy recipes, product reviews, and other good stuff that makes gluten-free living easy and a lot more fun!

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