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Monster Cookie Bars

Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings 12 bars
Calories 350
Deliciously chewy and chocolatey cookie bars packed with oats, M&Ms, and chocolate chunks, perfect for sharing.

Ingredients

Dough

  • 14 tablespoons unsalted butter (room temperature)
  • 1/2 cup creamy peanut butter
  • 1/2 cup light brown sugar (packed)
  • 1/2 cup dark brown sugar (packed)
  • 1/2 cup granulated sugar
  • 2 large eggs (room temperature)
  • 2 large egg yolks (room temperature)
  • 1 tablespoon vanilla extract
  • 2 cups all-purpose flour (see notes below for measuring)
  • 1 3/4 cup rolled oats (old-fashioned oats)
  • 1/2 cup semi-sweet chocolate chips
  • 1/2 cup chopped chocolate bar
  • 1/3 cup mini M&Ms
  • 1/3 cup regular M&Ms
  • 1 teaspoon baking soda
  • 1 teaspoon fine sea salt

Instructions 

  • Preheat oven to 350°F (180°C) and prepare a 9x13 pan.
  • Cream butter, peanut butter, and sugars until fluffy.
  • Add eggs and vanilla, mix well.
  • Fold in flour, oats, baking soda, salt, and chocolates; spread in pan.
  • Bake for 25-35 minutes until golden; cool before slicing.

Notes

For best results, do not overmix the dough.
Calories: 350kcal
Cost: $15
Course: Dessert
Cuisine: American
Keyword: chocolate, cookies, Oats