Using a large bowl with a hand mixer or a stand mixer with the paddle attachment, cream together the butter and brown sugar until fluffy (about 3 minutes).
½ cup unsalted butter, ¾ cup light brown sugar
Next, add the peanut butter, egg, and vanilla. Continue to mix until smooth, scraping down the sides as needed.
¾ cup creamy peanut butter, 1 large egg, 2 teaspoons pure vanilla extract
Add the cornstarch, baking soda, salt, and flour next. Mix on low speed just until combined, but don’t over mix. Pour in the quick oats, chocolate chips, and M&Ms, and continue to mix until combined.
1 teaspoon cornstarch, ½ teaspoon baking soda, ¼ teaspoon salt, 1 ¼ cup all-purpose flour, ½ cup quick oats, ½ cup semi-sweet chocolate chips, ½ cup M&Ms
Transfer the dough to the refrigerator to chill for at least 30 minutes.
Preheat the oven to 350°F, and line a baking sheet with parchment paper or a silicone mat.
Roll about 2 tablespoons of dough into a ball and gently press down in the center (don’t make them completely flat). Add additional M&Ms or chocolate chips to the top if you’d like.
Bake for 11-13 minutes. The centers will still look slightly soft and under cooked. Remove the cookies from the oven and allow them to cool on the baking sheet before transferring them to a cooling rack. All to cool for about 10 minutes before eating.
Store the cookies in an airtight container at room temperature for up to 5 days.
Notes
*The calories listed are an approximation based on the ingredients and a serving size of two monster cookies. Additionally, the calorie count does NOT include the extra candies seen on the plate in the photos. Actual calories will vary. *The cookies can be stored in a sealed container for up to five days.
Nutrition Facts
Homemade Monster Cookies Recipe
Serving Size
2 cookies
Amount per Serving
Calories
318
% Daily Value*
Fat
18
g
28
%
Saturated Fat
8
g
40
%
Trans Fat
0.3
g
Polyunsaturated Fat
2
g
Monounsaturated Fat
6
g
Cholesterol
31
mg
10
%
Sodium
206
mg
9
%
Potassium
159
mg
5
%
Carbohydrates
34
g
11
%
Fiber
2
g
8
%
Sugar
20
g
22
%
Protein
6
g
12
%
Vitamin A
239
IU
5
%
Vitamin C
0.04
mg
0
%
Calcium
36
mg
4
%
Iron
2
mg
11
%
* Percent Daily Values are based on a 2000 calorie diet.