Monster cookies are made with creamy peanut butter, oats, M&Ms, chocolate chips. My monster cookie recipe is SO easy to make and ready in under thirty minutes!
This is one of our most popular recipes (originally posted December 8, 2014), so I’ve updated them to include a how-to video! Enjoy!
Monster cookies have always been one of my favorite kinds of cookies, but I’ve never found a recipe that I fell in love with. After two months of testing, I can tell you that I’m in love and these are the best monster cookies I’ve ever had!
What are Monster Cookies?
Monster cookies are a soft chewy cookie made with four ingredients:
- Peanut Butter
- Chocolate Chips
Here’s a quick video showing how monster cookies are made…
As you can see in the picture above, these also make AMAZING ice cream sandwiches.
What Kind of Peanut Butter to Use for Monster Cookies?
I’d recommend against using an all natural peanut butter for this recipe because they tend to be more runny. Brands like Jiff or Skippy are your best bet and will keep your cookies from spreading out too much.
What Kind of Oats for Monster Cookies?
I recommend using old fashioned oats. You *can* use quick cooking, but they may spread more and won’t be as thick, fluffy, and sturdy. Steel cut oats will not work.
The Best Mix-ins for Monster Cookies
- M&Ms – we used regular today, but other flavors would be a fun addition as well (peanut, peanut butter, etc.)
- Chocolate chips – we used semi-sweet, but dark, white, or milk would be great too!
- Other mix in ideas: raisins, nuts, butterscotch chips, etc.
What are YOUR favorite mix-ins?
Why Do My Monster Cookies Go Flat? How Do I Make Them Thick?
1. Is your baking soda fresh? Old baking soda doesn’t work.
2. Use old fashioned oats, not instant, quick, or steel cut oats.
3. Butter temperature. Be sure to leave your butter out so it comes to room temperature – do not microwave it.
4. Refrigerating. It’s not necessary in this recipe, but may help to make them thicker and spread out less for you!
5. Cookie scoop. I always use cookie scoops in my recipes verses hand rolling. This allows them to cook uniformly and hold a better shape.
How Do I Keep My Cookies From Spreading?
Chilling dough can help to keep your cookies from spreading. Be sure you are measuring your oats correctly as well. Too few and your cookies won’t have enough bulk to keep them thick and fluffy.
How to Store Monster Cookies
Store these monster cookies in an airtight container at room temperature for up to a week or freeze in an airtight container after they’ve cooled for up to three months.
What other cookies recipes do you want to see? Show Me the Yummy!
- 1/2 cup unsalted butter softened to room temperature
- 1 1/4 cups dark brown sugar packed
- 1 cup granulated sugar
- 3 large eggs room temperature
- 1 tablespoon vanilla extract
- 1 1/2 cups creamy peanut butter
- 4 1/2 cups old fashioned oats certified gluten free if necessary
- 2 teaspoons baking soda
- 1/2 teaspoon salt
- 1 cup M&M's
- 1 cup semi-sweet chocolate chips
- Place butter, sugars, egg, vanilla, and peanut butter in a large bowl.
- Using a hand mixer or stand mixer, beat together until well combined.
- Add in oats, baking soda, salt, M&Ms, and chocolate chips.
- Mix until well combined.
- Optional: chill the dough for at least 30 minutes. I never do this, but if you're worried about spreading, I'd recommend chilling the dough.
- Preheat oven to 350 degrees F and line a rimmed baking sheet with a silicone baking mat.
- Use a cookie scoop to scoop cookie onto prepared baking sheet. I bake 12 at a time.
- Depending on the size of your cookie scoop, bake cookies for 8-12 minutes (8 for smaller cookies, 12 for larger cookies).
- Remove oven and let cool for a few minutes, before removing them from the cookie sheet and placing the cookies on a cooling rack.
- Serve immediately or cool completely before storing in airtight containers!
*Note: Nutritional information is estimated and varies based on products used.