Monster Cookies Recipe

Monster Cookies stacked on a white plate with a glass of milk in the background.

4.55 from 11 votes

Get ready for the ultimate sweet-and-salty treat! These Monster Cookies combine peanut butter, chocolate chips, and colorful M&M's for a chewy, festive cookie!

Prep Time20

Cook Time1

Total Time1 20

Course: Cookies

Cuisine: North American

Diet: Vegetarian

Servings: Cookies

Calories: 250kcal

Author: Linda

Ingredients

6 large eggs
2 1/3 cups firmly packed light brown sugar
2 cups white sugar
2 sticks of salted butter 1/2 pound, softened to room temperature
1 Tablespoon light corn syrup
1 teaspoon vanilla
4 teaspoons baking soda
2 1/4 cups peanut butter you can use creamy peanut butter or crunchy peanut butter
1 1/2 cups flour
7 cups quick 3-minute oats
1 1/3 cups semi-sweet chocolate chips
1 1/3 cup M&M candies standard size, any color combination you want

Instructions

Preheat your oven to 350 degrees Fahrenheit (175 degrees Celsius).
Spray cookie sheets with nonstick spray or line with parchment paper or silicone mats. Use 4 cookie sheets to allow one set to cool while the next set is baking.
Set aside 1/3 cup of the M&M's for adding to the top of the cookies later.
In a large mixing bowl, combine the peanut butter, butter, white sugar, brown sugar, and corn syrup. Use an electric mixer to mix until well combined.
Mix in the eggs, vanilla, baking soda, and flour.
Mix in the oats.
Stir in the chocolate chips and M&M's (just 1 cup, keep the other 1/3 cup for later).
Make large cookie dough balls and pat them out into rounds that are about 3 1/2 inches in diameter and 1/2 inch tall. Place them on a cookie sheet with space around them to expand. You should only put 6 per cookie sheet. For the 60-minute cook time, bake 2 cookie sheets at a time.
Add a few of the saved M&M's to the top of the cookies for decoration.
Bake for 10-12 minutes until the edges turn golden brown. Be careful not to overbake them.
Let the cookies cool for 5 minutes on the cookie sheets.
Transfer to wire racks and allow them to cool completely before storing them in an airtight container with wax paper between the layers of cookies to prevent sticking.
Optionally, freeze some for later.

Notes

Store leftover Monster Cookies in an airtight container at room temperature for up to a week, using wax paper between layers if stacked. They’re best enjoyed within the first three days.

To freeze, let the cookies cool, then store them wrapped in plastic inside an airtight container or freezer bag for up to 3 months. When ready to eat, thaw at room temperature or warm in a 300°F (150°C) oven for 5-10 minutes.

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