This gluten-free monster cookie recipe is a delightful blend of warm, comforting peanut butter and rich, melty chocolate flavors. Every bite offers the perfect mix of gooey chocolate and the hearty crunch of oats. They’re loaded with flavor and incredibly easy to make—no need for flour or special equipment, just a big mixing bowl and a few simple ingredients you likely already have at home.

The charm of these cookies lies not only in their delicious, comforting taste but also in how quickly they come together. As a simple gluten-free dessert, you don’t have to chill the dough or use any complicated techniques—just mix, shape, and bake, and in under 15 minutes, you’ll have these treats ready to enjoy.

Each bite is a colorful, joyful mix of chocolate chips, M&Ms, and chewy oats, creating a balance of sweetness, softness, and crunch that’s bound to satisfy any craving. These cookies have a soft, slightly chewy texture that’s simply irresistible.

If you’re looking for a fun, homemade snack to share with friends, family, or even to treat yourself, this gluten-free monster cookie recipe is a perfect choice!

Yields: About 20-24 cookies

 

Ingredients

• 1 cup creamy peanut butter (ensure it’s gluten-free)
• 1/2 cup unsalted butter, softened
• 1 cup light brown sugar, packed
• 1/2 cup granulated sugar
• 2 large eggs
• 1 tablespoon vanilla extract
• 2 teaspoons baking soda
• 3 cups gluten-free old-fashioned rolled oats
• 1/2 cup mini chocolate chips (or regular chocolate chips)
• 1/2 cup gluten-free M&Ms or candy-coated chocolate pieces

Optional Add-Ins

• 1/2 cup chopped nuts (like peanuts, almonds, or pecans)
• 1/4 cup mini marshmallows (for an extra chewy twist)

Instructions

1. Preheat oven to 350°F (175°C). Line two baking sheets with parchment paper or a silicone baking mat.
2. Cream Butter and Sugars: In a large mixing bowl, beat the peanut butter, softened butter, brown sugar, and granulated sugar until creamy and well combined (about 2-3 minutes).
3. Add Eggs and Vanilla: Add in the eggs and vanilla extract. Beat until smooth and fluffy.
4. Mix in Dry Ingredients: Sprinkle in the baking soda, then add the oats. Stir until well incorporated. The dough will be thick.
5. Fold in Chocolate Chips and M&Ms: Gently fold in the chocolate chips, M&Ms, and any additional mix-ins you’d like to add.
6. Form Cookies: Scoop about 2 tablespoons of dough per cookie and place on the prepared baking sheets, spacing them about 2 inches apart. Press each cookie lightly to flatten, as they won’t spread much on their own.
7. Bake: Bake for 10-12 minutes or until the edges are golden. The centers will look slightly soft — they’ll firm up as they cool.
8. Cool and Enjoy: Let the cookies cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely.

Ingredient	Amount	Calories per 100g	Total Calories
Peanut butter	1 cup (approx. 256g)	588 calories	1,500
Unsalted butter	1/2 cup (113g)	717 calories	810
Brown sugar	1 cup (220g)	380 calories	836
Granulated sugar	1/2 cup (100g)	387 calories	387
Eggs	2 large (approx. 100g)	155 calories	155
Vanilla extract	1 tbsp (15ml)	288 calories per 100ml	43
Gluten-free rolled oats	3 cups (240g)	389 calories	934
Chocolate chips	1/2 cup (85g)	479 calories	407
Candy-coated chocolates (M&Ms)	1/2 cup (80g)	477 calories	382
Total Calories			5,454

Calories Per Cookie

If this recipe yields about 20 cookies, each cookie will contain approximately 273 calories.

 

here’s a table showing both the total nutritional values for the entire recipe and the approximate nutritional values per cookie (assuming the recipe yields 20 cookies).

Can I make these cookies dairy-free/vegan?

1. Replace the Butter

• Use a dairy-free butter substitute (like vegan margarine or coconut oil) to make these dairy-free cookies. If you use coconut oil, be aware it will add a slight coconut flavor to the cookies.
  • Alternatively, you could try using an extra 1/4 cup of peanut butter instead, though this may make the cookies a bit softer

2. Replace the Eggs

• Substitute each egg with a “flax egg” or “chia egg.” To make one flax or chia egg, mix 1 tablespoon of ground flaxseed or chia seeds with 3 tablespoons of water, let it sit for 5-10 minutes until it thickens, then add it to the dough. For this recipe, you’ll need 2 flax or chia eggs.
• Another option is to use unsweetened applesauce (1/4 cup per egg), which will give a slightly softer texture.

3. Use Dairy-Free Chocolate Chips and Candy

• Most chocolate chips and M&Ms contain milk, so be sure to choose dairy-free or vegan chocolate chips (such as Enjoy Life or Hu chocolate).
• For the candy pieces, try looking for vegan candy-coated chocolate alternatives, or skip this part if it’s hard to find.

Other Tips for gluten-free monster cookie recipe

• Check Labels on Oats: While oats are naturally gluten-free, they can be cross-contaminated with gluten during processing. Be sure to use certified gluten-free oats if needed.

With these swaps, your monster cookies will be fully vegan and dairy-free, while still having that classic chewy, chocolatey goodness. Enjoy baking!

Nutrient	Total Amount for Recipe	Per Cookie (approx. 20 cookies)
Calories	5,454 kcal	273 kcal
Protein	94 g	4.7 g
Fiber	28 g	1.4 g
Total Fat	304 g	15.2 g
Saturated Fat	83 g	4.2 g
Cholesterol	445 mg	22 mg
Carbohydrates	547 g	27.4 g
Sugars	357 g	17.9 g
Calcium	350 mg	17.5 mg
Iron	16 mg	0.8 mg