A family favorite for years, these gluten-free monster cookies are chewy cookies that are chock full of peanut butter, gluten-free oats, chocolate and M&M’s. This easy, flourless oatmeal peanut butter cookie recipe is one that I love to whip up to have on hand for after school treats! Gluten-free monster cookies are a staple at our house. I made these cookies for many years before needing to go gluten-free, and they were one of the easiest recipes to switch to gluten-free since they don’t have any flour in them. Just use gluten-free oats and verify that all other ingredients are gluten-free like they should be, and these are easy as can be! Flourless cookies like these and my flourless chocolate cookies are great options for making when you don’t have any gluten-free flour blends on hand. Why are these called Monster Cookies? Honestly, I have no idea why these have always been called Monster Cookies instead of just gluten-free M&M cookies. Maybe the person that coined that term was making each cookie really huge too? I make mine approximately palm-sized, but you could go bigger or smaller, just adjust baking time a bit! With whole grain gluten-free oats, and protein from the peanut butter, I feel good about having these for a snack. I even had a friend bring these to me when I was nursing my baby, recommending them as a great snack to keep my energy and blood sugar up between meals. Seriously, it doesn’t get much better than a friend bringing you delicious flourless oatmeal peanut butter cookies and encouraging you to eat them for your health! I’ve brought them to new moms, playdates, and just last week, to our small group from church. Kids and adults all love these! The recipe makes 3 dozen cookies, so you have plenty to share! It’s fun to switch these up for the holidays by using holiday colored plain M&M’s too! I’ve used all red and pink for Valentine’s day, or all green and red for Christmas. For patriotic holidays, I use red, white and blue M&M’s. I brought them to our 4th of July potluck last year like this: I’ve even been known to use all the orange and blue ones to make these for a Boise State Football party! BOISE! Looking for more cookie recipes that use peanut butter? Check out my gluten-free double peanut butter cookies – they’re so soft and yummy! If you’re looking for a flourless option like these, then you might like these flourless, sugar-free gluten-free peanut butter cookies. If you’d like a vegan option, try these vegan peanut butter chocolate chunk cookies. So many yummy options! If you’ve got a favorite cookie that I haven’t shared a recipe for yet, be sure to let me know! Also check out my Pinterest board full of gluten-free cookies! If you make these and love them, please come back and give this recipe a 5 star rating in the recipe card! Feel free to comment with tips or to share any successful substitutions you made. A family favorite for years, these gluten-free monster cookies are chewy cookies that are chock full of peanut butter, gluten-free oats, chocolate and M&M’s. This easy, flourless oatmeal peanut butter cookie recipe is one that I love to whip up to have on hand for after school treats! Please see blog post for recommended brands and substitution suggestions. You are welcome to make these smaller or larger than the size I use. Your baking time will vary depending on size - typically a minute or two shorter baking time for smaller cookies, and about 1-2 minutes longer for larger cookies. As an Amazon Associate and member of other affiliate programs, I earn from qualifying purchases. I hope you love these cookies as much as my family does! Notes on Ingredients and substitutions for Gluten-free Monster Cookies:
Gluten-free Monster Cookies recipe:
Gluten-free Monster Cookies
Ingredients
Instructions
Notes
Recommended Products
Yield: 36 cookies
Prep Time
7 minutes
Cook Time
12 minutes
Total Time
19 minutes
GF Harvest Gluten Free Certified Organic Rolled Oats
Jif Natural Creamy Peanut Butter, 40 oz.
M&M's Milk Chocolate Candies 3lb 14oz Jar
Nielsen-Massey Madagascar Bourbon Pure Vanilla Extract, 4 oz.
AirBake Nonstick 2 Pack Cookie Sheet Set
Parchment Paper Baking Sheets - (100 pcs) - Pre-cut Perfect Fit for Sheet Pans
OXO Good Grips Medium Cookie Scoop
Lori
Sunday 13th of December 2020
Anyone one make this with an egg substitute as well as coconut oil instead of butter? Would i ruin the cookies?
Chelsie
Sunday 18th of October 2020
I made these and they went flat :( , I added more oatmeal... still flat... I added about a cup of Gluten free flour and they turned out perfect.
Dana
Saturday 12th of September 2020
Excellent GF cookie! I agree, I love that it doesn't include "expensive" gf ingredients, other than the certified gf oats I have to have. Keeper for Christmastime! Just like the monster cookies I remember as a child !!!!
Shawna Baker
Sunday 7th of June 2020
I love the recipe, but I always alter recipes by adding more vanilla and I prefer the brown sugar/white ratio to be bigger. For this recipe, I used 1 1/2 cups dark brown sugar and 1/2 cup of evaporated cane sugar and 1 tbs of vanilla. Fantastic! I have celiac disease, so I really appreciate the GF recipes out there. Thank you!
Michelle Palin ~ My Gluten-free Kitchen
Thursday 11th of June 2020
Glad you've been able to tweak this to your liking! Happy baking!
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