Go Back
+ servings
5 from 1 vote

Peanut Butter Monster Cookies

Recipe Source: Sally's Baking Addiction
Course Dessert
Category Cookie
Prep Time 10 minutes
Cook Time 10 minutes
Total Time 20 minutes
Servings 24 cookies (depending on size of scoop)
Calories 170 kcal
Author Melissa Rose


  • 1/2 cup 1 stick butter, softened
  • 1/2 cup light brown sugar
  • 1/4 cup sugar
  • 3/4 cup creamy peanut butter
  • 1 large egg
  • 1 teaspoon vanilla extract
  • 1/2 teaspoon baking soda
  • 1 and 1/4 cups all purpose flour
  • 1/2 cup quick oats
  • 3/4 cup M&Ms
  • 1/2 cup semi-sweet chocolate chips


  1. First, preheat oven to 350 degrees.
  2. In a large bowl, combine the softened butter, brown sugar, and white sugar. Beat with electric mixer for 2 minutes or until combined & fluffy. Add the peanut butter and continue mixing until combined (about 30 seconds). Next, slowly add the egg and vanilla and beat (on slow) for about 10 seconds until the ingredients are incorporated. Next, add the flour and baking soda and beat JUST until the flour disappears. (You do not want to overbeat the dough at this point, as this can cause leavening problems.) Using a wooden spoon, fold in the oats, M&M's, and chocolate chips.
  3. Roll the dough in 2 tablespoon balls and place on greased (or parchment covered) cookie sheet. You may place them pretty close together (1.5-2 inches apart), as they do not spread much in the oven. You may place some M&M's on the tops of the balls of dough before baking for presentation.
  4. Bake at 350 degrees for 9-10 minutes. This dough puffs up and may not *look* parchment covered done by 9 minutes, but they will continue to bake on the cookie sheet. Do not leave them in longer than 10 minutes, as this may result in an overcooked/crunchy cookie.

  5. Once they come out of the oven, you can lightly press them down with the back of a metal spoon. They will puff up during baking, so if you prefer a flatter cookie top, be sure to do this.
  6. * Makes about 24-30 (2 tablespoon) cookies. Larger cookies will yield less.
Nutrition Facts
Peanut Butter Monster Cookies
Amount Per Serving
Calories 170 Calories from Fat 99
% Daily Value*
Fat 11g17%
Saturated Fat 5g25%
Cholesterol 18mg6%
Sodium 102mg4%
Potassium 88mg3%
Carbohydrates 15g5%
Fiber 1g4%
Sugar 12g13%
Protein 3g6%
Vitamin A 145IU3%
Calcium 20mg2%
Iron 0.6mg3%
* Nutritional information is estimated from a online calculator and can vary based on ingredients. Percent Daily Values are based on a 2000 calorie diet.