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Monster Fudge Bars

No one can resist these EASY Monster Fudge Bars! Oatmeal chocolate chip cookie bars topped with easy fudge and mini M&M's! This is one decadent treat!
Course Dessert
Cuisine American
Keyword fudge, monster fudge bars
Prep Time 5 minutes
Cook Time 25 minutes
Total Time 30 minutes
Servings 36 bars
Calories 153kcal
Author Trish - Mom On Timeout


  • 2 cups refrigerated chocolate chip cookie dough about 15 oz
  • 1/2 cup oats old fashioned or quick oats are fine
  • 1 cup mini M&M's + more for topping
  • 1 cup Reese's peanut butter chips
  • 14 oz sweetened condensed milk
  • 12 oz semisweet chocolate chips
  • 1 tsp vanilla extract


  • Preheat oven to 350F (for a glass pan), 325F (for a dark pan).
  • Line a 9 x 13 pan with parchment paper and set aside.
  • In a large bowl, crumble up the cookie dough and stir in oats, one cup M&Ms and peanut butter chips. Mix until combined.
  • Press the dough evenly into the prepared pan.
  • Bake for 10 minutes.
  • While dough is baking, combine sweetened condensed milk and chocolate chips in a microwave safe container. Heat on high heat for 30 seconds, stir. Repeat until smooth. Stir in vanilla extract.
  • Pour the fudge mixture over the partially baked crust and carefully spread. The dough is not fully baked so make sure to evenly pour the fudge to start with.
  • Sprinkle with additional mini M&Ms, the amount is up to you. I did about 1 cup.
  • Return to the oven and bake for another 15 to 18 minutes or just until the edges and center begin to crack.
  • Let bars cool completely on a wire rack before cutting into bars. I like to refrigerate my bars for a good hour so the fudge is nice and set up.


Calories: 153kcal | Carbohydrates: 19g | Protein: 3g | Fat: 8g | Saturated Fat: 5g | Cholesterol: 6mg | Sodium: 31mg | Potassium: 100mg | Fiber: 1g | Sugar: 15g | Vitamin A: 47IU | Vitamin C: 1mg | Calcium: 44mg | Iron: 1mg