Monster Cookie Bars

5 from 6 votes

These soft and chewy monster cookie bars are a delicious mix of creamy peanut butter, oats, chocolate chips and M&M's in an easy-to-make bar cookie form. The perfect sweet treat for any occasion!

Prep Time10

Cook Time30

Total Time40

Course: Dessert

Cuisine: American

Servings:

Author: Dee

Cost: $10

Ingredients

1 cup butter softened
½ cup creamy peanut butter
1 cup firmly packed brown sugar
1 cup granulated sugar
2 large eggs
2 teaspoons vanilla extract
2 cups all purpose flour
1 teaspoon baking soda
1 teaspoon sea salt
1 teaspoon ground cinnamon
1¼ cups rolled oats
1¼ cups semi sweet chocolate chips plus extra for the top
1 cup mini m&ms plus extra for the top

Instructions

Preheat oven to 350℉ and prepare a 9x13 baking dish with parchment paper or nonstick spray
In a large mixing bowl, beat the butter and creamy peanut butter together until creamy and all lumps are gone
Add in the brown sugar and granulated sugar and cream until fluffy and well combined
Beat in the eggs and vanilla extract
Add flour, baking soda, sea salt and ground cinnamon and mix well
Stir in the oats, chocolate chips and mini m&ms until fully combined
Evenly spread the dough into prepared baking dish
Top cookie bar dough with extra chocolate chips and mini m&ms
Bake for 30 minutes, or until edges are lightly brown and a toothpick comes out clean
Remove from oven, allow to cool slightly, then transfer to wire rack or cool surface to cool completely

Video

Notes

Do not over bake cookie bars. Edges should be golden brown and firm, and a toothpick should come out clean. Center may be soft but will firm up as the bars cool.

For perfectly cut cookie bars, score the bars first before cutting. Always wipe the knife clean after making every cut.

To keep cookie bars soft, store in an airtight container with a piece of sandwich bread.

Nutrition

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