Go Back
+ servings
A stack of three Monster Cookies Magic Bars

Monster Magic Cookie Bars

Prep Time: 5 minutes
Cook Time: 45 minutes
Total Time: 50 minutes
Servings: 12 cookie bars
Calories: 461kcal
Author: Holly
All you need are 6 ingredients and 5 minutes prep time for these tasty monster cookie bars. This is sure to become your new favorite!


  • 1 package peanut butter cookie dough 16 ounce package
  • 1 cup old fashioned oats
  • 1 cup chocolate chips divided
  • 1 cup peanut butter chips divided
  • 1 can sweetened condensed milk 14 ounce can
  • ¾ cup mini M&M’s


  • Preheat the oven to 350°F, line a 9x13 inch pan with parchment paper, and set aside.
  • Mix cookie dough and oats well.
  • Press cookie dough into bottom of prepared baking pan.
  • Bake for 15 minutes.
  • Remove from oven, and sprinkle ½ the chocolate chips and ½ the peanut butter chips over dough.
  • Pour sweetened condensed milk over everything. Sprinkle with remaining chocolate chips, peanut butter chips, and M&M’s.
  • Bake for 25 to 30 minutes or until the sweetened condensed milk has set.*
  • Remove from oven and let cool completely before slicing and serving.


*The condensed milk will begin to caramelize around the edges while remaining white in the center.
Cookie bars can be kept at room temperature in a sealed container for about 4 days.
Wrap individual portions in plastic wrap and freeze for up to a month.


Serving: 1cookie bar | Calories: 461kcal | Carbohydrates: 65g | Protein: 9g | Fat: 19g | Saturated Fat: 11g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 4g | Trans Fat: 1g | Cholesterol: 21mg | Sodium: 165mg | Potassium: 185mg | Fiber: 2g | Sugar: 51g | Vitamin A: 160IU | Vitamin C: 1mg | Calcium: 132mg | Iron: 2mg