Monster Cookies

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If you are needing a great cookie recipe, these Monster Cookies will be a great dessert that everyone will love. We loaded them with peanut butter, oatmeal, chocolate chips and M&M’s. You can quickly make these thick and chewy cookies to enjoy with a glass of milk.

Monster Cookies on a white background.

Monster Cookies

When you’re craving a large delicious cookie, then this is the cookie for you. This recipe turns out perfect every time. Sometimes I enjoy having mine with a large ice cream scoop or a tall glass of milk. Monster Cookies are just as good as these 3 Ingredient Peanut Butter Cookies, Soft Snickerdoodle Cookies, or even these Caramel Apple Pie Cookies.

Stack of Monster Cookies

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Back to school will be here before we know it.  Making cookies is a must for my kiddos lunchbox dessert. When they are back to class, I find myself making a different cookie each weekend for them to enjoy. Making large batches is perfect for feeding them all week long. Homemade cookies are so much better than store-bought. Plus, they cost less.

Monster Cookies with text.

I have made my share of very complicated cookie recipes. Many times I have had complete failures. This recipe never fails. All of the ingredients come together so easily, there is no chilling involved. As a matter of fact, my kids have made these Monster Cookies on their own.

Monster Cookies on a white plate.

I have made my Monster Cookies so many times, I could not even keep count. If I have a summer picnic or potluck, they are a great option for feeding a crowd. I have also made them as a Christmas Cookie with red and green M&M’s. I find them to be an easy homemade cookie that everyone finds delicious.

Ingredients to make Monster Cookies

Ingredients To Make Monster Cookies

  • Peanut Butter
  • Quick Oats
  • Peanut Butter
  • Sugar
  • Brown Sugar
  • Baking Soda
  • Eggs
  • Butter
  • Vanilla
  • Chocolate Chips
  • M&M candies

Monster cookie ingredients in a bowl.

How to Make Monster Cookies

First, it is necessary to preheat the oven to 350 degrees.  Then, line a cookie sheet with parchment paper. In a large bowl, we add the eggs, sugars, baking soda, and vanilla. Mix this mixture well.

Adding mix-ins to make Monster Cookies

Next, we add butter and eggs. I beat the mixture well with a hand mixer. After combining well, toss in the oats, chocolate chips, and candies. I use a spatula to incorporate all the ingredients.

Monster Cookie Ingredients in a bowl.

Then they are placed in the oven to bake for about 9 minutes. After removing them from the oven, I let them cool for a few minutes on the cookie sheet. I store them in an airtight (Zipper bag) and they will keep for fresh for about a week.

Unbaked cookies on a baking sheet.

I made this batch of cookies a bit smaller than usual so I could feed a few more guests. When making them for lunches, I make the monster sized.

Stack of Monster Cookies on a white background.

Looking for other great cookie recipes? See some of these other recipes that I have shared:

5 from 1 vote

Monster Cookies Recipe

Prep: 10 minutes
Cook: 9 minutes

Ingredients 

  • 3 Eggs
  • 1 1/4 cup Brown Sugar
  • 1 cup Sugar
  • 1 1/2 cup Peanut Butter
  • 1/2 cup Softened Butter
  • 1/2 tsp Salt
  • 1/2 tsp Vanilla
  • 1 1/2 cup M&M's Candies
  • 1 cup Chocolate Chips
  • 2 tsp Baking Soda
  • 4 1/2 cup Quick Cooking Oats

Instructions 

  • Preheat the oven to 350 degrees.
  • Line a cookie sheet with parchment paper or use silicone mat.
  • In a large bowl, combine eggs, vanilla, salt, sugar, brown sugar and baking soda. Mix until combined.
  • Add in peanut butter, and butter. Mix until well incorporated.
  • Fold in the oatmeal, chocolate chips and M&M's.
  • For monster sized cookies, use a tablespoon to place dough on the prepared sheets several inches apart.
  • Bake for about 9 minutes.
  • Do not remove from cookie sheet for about 3 minutes. Then transfer to rack to finish cooling.
Like this recipe? Rate and comment below!

Monster Cookie recipe collage.

Small collage of baked Monster Cookies.

About Jen Lunsford

A lover of food and frugal living. A wife to a wonderful hubby, momma to 5 fun kiddos. Welcome to my blog. You will find REAL TASTY RECIPES. Be sure to subscribe to my email list and follow me on social media, to never miss a recipe.

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2 Comments

  1. I’m making these cookies now. I tried to form them into balls using my hands . O my what a mess !! I could not get them to stick together to form a ball The batter stuck to my hands & fingers. Baked a couple to see how they would turn out . Well, they look nothing like yours. I must have done something wrong but don’t know what . Followed recipe. Very disappointed!!

    1. Hi Vicki! I am sorry that you had a hard time. If you should decide to make them again and the dough is too soft to form, go ahead and put them in the fridge to chill for a few minutes. I hope this helps- Jen