Monster Cookie Bars

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5 from 11 votes

Soft, chewy Monster Cookie bars stuffed full of peanut butter chips and M&M's!

Prep Time10

Cook Time15

Total Time25

Course: Dessert

Cuisine: American

Servings:

Calories: 532kcal

Author: Julie Evink

Ingredients

½ cup butter softened
3 eggs beaten
1 cup white sugar
1 teaspoon vanilla
1 teaspoon corn syrup
2 teaspoon baking soda
1 cup brown sugar packed
1 ½ cups peanut butter
4 ½ cups quick oatmeal
6 ounces chocolate chips
6 ounces M&M's

Instructions

Preheat oven to 350 degrees Fahrenheit. Spray a 18x13 inch baking pan with non-stick spray. Set aside.
In a large mixing bowl or bowl of a stand mixer, add butter and sugars. Beat together until creamed.
Add eggs, vanilla, corn syrup, and baking soda and mix until just combined. Sir in peanut butter and mix until combined then stir in oatmeal and mix.
Add chocolate chips and gently mix by hand until combined.
Spread into a greased 18 x 13 inch pan. Sprinkle M&Ms on top of batter in a pan and gently press into the dough.
Place in the oven and preheated at 350 degrees Fahrenheit for 15 minutes for a soft, chewy bar. They will not look done, but will cook as they set.

Video

Notes

Mix it up and uses peanut butter chips and Reese's Pieces for a peanut butter Monster Bar!

Place leftover bars into an airtight container with parchment paper between layers and store at room temperature for 3-4 days.

FRIDGE: To make this treat last a bit longer, store leftovers in the refrigerator for up to a week.

FREEZER: Monster cookie bars can be frozen too! Wrap each bar individually in plastic wrap or place them in an airtight container. Store in the freezer for up to 3 months. Allow to thaw before eating.

Nutrition