The BEST Soft Baked Monster Cookies- Gluten Free!

5 from 6 votes
Jump to RecipePinSave to Favorites

Site Index Chocolate chip cookies Christmas cookies Cookies Oatmeal Oatmeal cookies Peanut butter cookies

This post may contain affiliate links. See my privacy policy for details.

Soft baked monster cookies are the ultimate peanut butter, oatmeal, and chocolate M&M’s cookie – that also happens to be a flourless, gluten-free treat. Monster cookies have been around for decades upon decades and everyone I know ate these growing up!

Now I’m not sure why monster cookies have had flour added to them over the years, but there should be NO flour if it’s an original monster cookie recipe! You should never have to add flour to bind the cookies together in a real monster cookie recipe.

Three Pieces Soft Baked Monster Cookies
Soft Baked Monster Cookies

Monster Cookies

Monster cookies were invented in 1971 by Dick Wesley in Michigan. It was first published in the State Journal and Dick had actually ground the oatmeal into an oatmeal flour using his blender (a smart man ahead of his time, I tell you!) because he didn’t have any flour at home. You can check out the original recipe by clicking the link in his name in the last sentence and see how it’s evolved over the years and how HUGE the original recipe is! Now over the years, we have learned that you don’t have to grind the oatmeal, that step has been skipped over entirely since peanut butter, eggs and oatmeal have this fantastic way of binding together in cookies that eschews the need for flour. You simply have to bake them and cool them correctly!

ingredients for monster cookies

You probably already have most of the ingredients for these cookies in your pantry already.

  • butter
  • granulated and brown sugars
  • vanilla
  • eggs
  • peanut butter – don’t use natural, the cookies will fall apart
  • rolled oats – it has to be heavier rolled oats, not instant oats
  • cornstarch – a secret trick to bind these together even more that still keeps them gluten-free. Not original to the recipe, this is my addition to help you make better cookies that are still gluten-free! 
  • chocolate M&M’s – you can change these up if you want to mint M&M’s, or any other flavor you enjoy!
  • chocolate chips
  • optional ingredients: shredded coconut ( a good binder as well), a cup of peanuts


monster cookies on a cooling rack

  • Monster cookies are notorious for falling apart and I know a lot of readers have a hard time with them, so I came up with a little trick fo you all –  use some gluten-free cornstarch to help the cookies bind together.  (yes, inherently gluten-free but there is always contamination issues, make sure to look for a verified gluten-free brand).
  • Make sure to COOL MONSTER COOKIES COMPLETELY ON THE BAKING SHEETS or they will fall apart! This is the main secret to great monster cookies! 
  • Add some chill time for the dough in the refrigerator to help them stick together as well.
  • Monster cookies are supposed to be large and in charge!


large scoop of monster cookie batter in baking sheet

More Oatmeal and Peanut Butter Cookies

Now all of these recipes aren’t gluten-free, but if you are looking for oatmeal and peanut butter tasting cookies, try some of these:


Hope you love this old fashioned classic cookie!

Love you more than chocolate,


How to make the BEST soft-baked Monster Cookies using the original recipe - plus my secret ingredient that helps keep these monster cookies from falling apart! #glutenfree #monstercookies #dessert


Enter your email to get this recipe emailed to you, so you don’t lose it and get new recipes daily!

The BEST Soft Baked Monster Cookies- Gluten Free!

How to make the BEST soft-baked Monster Cookies using the original recipe - plus my secret ingredient that helps keep these monster cookies from falling apart!
5 from 6 votes
Prep Time
10 minutes
Cook Time
15 minutes
36 cookies
Karlynn Johnston


  • 1/2 cup butter
  • 1 1/2 cups packed brown sugar
  • 1 cup white sugar
  • 3 large eggs
  • 1 1/2 cups peanut butter
  • 1 teaspoon vanilla extract
  • 2 teaspoons baking soda
  • 2 tablespoons cornstarch
  • 1 teaspoons salt
  • 4 1/2 cups rolled oats
  • 2 cups chocolate M&M's
  • 1 cup of chocolate chips butterscotch chips or whatever your heart desires


  • Preheat your oven to 350 degrees F.
  • Cream the butter and sugars together until creamy. Beat in the eggs completely.
  • Add the peanut butter and vanilla, mix until incorporated.
  • Add the baking soda, cornstarch, salt and rolled oats.
  • Stir in the M&M's and choice of chocolate chips by hand.
  • Place the dough in the refrigerator for 20 minutes to harden somewhat.
  • Use a large cookie scoop and place on an ungreased cookie sheet at least two inches apart.
  • Bake for 12 to 15 minutes, until the edges are browned and the cookie is baked in the middle.
  • Remove and cool on the sheets completely.
  • Store in a closed container on the counter for up to 5 days. These freeze well.

Recipe Notes

  •  Nutrition will depend on what you add to these cookies for M&M's, chocolate chips etc.

Nutrition Information

Calories: 214kcal, Carbohydrates: 27g, Protein: 5g, Fat: 10g, Saturated Fat: 4g, Cholesterol: 23mg, Sodium: 210mg, Potassium: 124mg, Fiber: 2g, Sugar: 19g, Vitamin A: 112IU, Vitamin C: 1mg, Calcium: 26mg, Iron: 1mg

All calories and info are based on a third party calculator and are only an estimate. Actual nutritional info will vary with brands used, your measuring methods, portion sizes and more.

Made this recipe?

Share a photo of what you made on Instagram or Facebook and tag me @thekitchenmagpie or hashtag it #thekitchenmagpie.

Please rate this recipe in the comments below to help out your fellow cooks!

Learn to cook like the Kitchen Magpie

A Very Prairie Christmas Bakebook

Cookies, Candies, Cakes & More: Vintage Baking to Celebrate the Festive Season!

Learn More

a copy of Flapper Pie cook book

Flapper Pie and a Blue Prairie Sky

A Modern Baker’s Guide to Old-Fashioned Desserts

Learn More

The Prairie Table

Suppers, Potlucks & Socials: Crowd-Pleasing Recipes to Bring People Together

Learn More


Karlynn Johnston

I’m a busy mom of two, wife & cookbook author who loves creating fast, fresh meals for my little family on the Canadian prairies. Karlynn Facts: I'm allergic to broccoli. I've never met a cocktail that I didn't like. I would rather burn down my house than clean it. Most of all, I love helping YOU get dinner ready because there's nothing more important than connecting with our loved ones around the dinner table!

Learn more about me

Site Index Chocolate chip cookies Christmas cookies Cookies Oatmeal Oatmeal cookies Peanut butter cookies

Reader Interactions

Leave a Comment or Recipe Tip

Recipe Rating