Recipe for Monster Cookies

4.53 from 19 votes

Soft, chewy, and bursting with flavor, these Peanut Butter Oatmeal Cookies are loaded with chocolate chips and colorful M&M’s! Perfectly sweet with a hint of crunch, they’re the ultimate treat for cookie lovers. Quick to make and easy to customize, these crowd-pleasers are ideal for parties, holiday baking, or a simple indulgence at home.

Course: Desserts

Cuisine: American

Servings:

Calories: 6229kcal

Author: This Worthey Life

Ingredients

1 ½ cups creamy peanut butter
1 cup granulated sugar
1 cup brown sugar packed
½ cup softened butter
1 tablespoon sour cream
3 large eggs
½ teaspoon vanilla extract
4 ½ cups rolled oats not quick-cooking
2 teaspoons baking soda
1 cup chocolate chips
1 cup regular or baking M&M’s

Instructions

Preheat the oven to 350°F. Line baking sheets with foil or parchment paper for easy cleanup.
Mix wet ingredients: In a large mixing bowl, combine 3 eggs, 1 cup granulated sugar, and 1 cup packed brown sugar. Beat until smooth and well combined.
Add 1 ½ cups creamy peanut butter, ½ cup softened butter, 1 tablespoon sour cream, and ½ teaspoon vanilla extract to the sugar mixture. Mix until the ingredients are fully incorporated.
Sprinkle in 2 teaspoons baking soda, stirring well. Gradually mix in 4 ½ cups of rolled oats until evenly combined.
Stir in 1 cup chocolate chips and ¾ cup M&M’s, reserving the remaining M&M’s for topping.
Drop large tablespoons of dough onto the prepared baking sheets, leaving about 2 inches between each cookie. Gently press the dough into a rounded shape. Press a few of the reserved M&M’s into the tops of each cookie for decoration.
Place the cookies in the preheated oven and bake for 10-12 minutes or until the edges are golden brown. Avoid overbaking; slightly undercooked cookies yield a softer texture.
Remove the cookies from the oven and let them cool on the baking sheet for 5 minutes. Transfer to a wire rack to cool completely.

Nutrition