M&M Cookie Bars with Oreos and Peanut Butter Cups

Cookie bars with colorful M&M's, Oreos, and peanut butter cups piled on a wood board

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M&M Cookie Bars with Oreos and Peanut Butter Cups

Irresistible M&M cookie bars with Oreos and peanut butter cups! Soft, chewy, and loaded with chocolatey goodness.

Prep Time10

Cook Time30

Total Time40

Course: Cookies

Cuisine: American

Keyword: loaded cookie bars, M&M Cookie Bars with Oreos

Servings: servings

Calories: 367kcal

Author: Lois

Equipment

Ingredients

3 cups all purpose flour
¾ teaspoon baking powder
¾ teaspoon baking soda
¾ teaspoon salt
1 cup unsalted butter, melted (2 sticks)
¾ cup sugar
1 cup packed brown sugar
2 eggs
2 teaspoons vanilla extract
1 cup M&M candies
18 Oreo cookies, crushed or coarsely chopped
½ cup peanut butter cups, chopped

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Instructions

Preheat the oven to 350°F. Prepare a 9x13 baking pan by spritzing with nonstick cooking spray and lining with parchment paper.
In a medium bowl, whisk together the flour, baking powder, baking soda, and salt. Set aside.
In a mixing bowl, beat the melted butter, sugar, and brown sugar until well combined. Add the eggs and vanilla extract, mixing well.
Add the flour mixture to the mixing bowl and beat on low until combined, scraping down the sides as needed.
Fold in the M&M's, Oreos, and peanut butter cups.
Press the batter evenly into the prepared baking pan.
Bake for 25 to 30 minutes or until a toothpick inserted in the center returns clean.
Place the pan on a wire rack and let it cool completely.
To cut the bars, lift the cookies from the baking pan using the parchment paper. For easier slicing, use a serrated knife.

Notes

Room Temperature: Leftover bar cookies can be stored in an airtight container at room temperature for up to 3 days.

Freezer: You can freeze them in an airtight container for up to 3 months. Wrap each cookie individually in plastic wrap or wax paper. This will help to prevent them from sticking together and drying out.

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