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Chewy Monster Cookie Bars Recipe Easy Homemade M&M Dessert

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These chewy monster cookie bars combine peanut butter, oats, and colorful M&Ms for a soft, gooey, and crowd-pleasing treat that’s quick and easy to make.

Ingredients

Scale
  • 1 cup (225g) unsalted butter, softened
  • 1 cup (200g) packed brown sugar
  • 1/2 cup (100g) granulated sugar
  • 2 large eggs, room temperature
  • 1 1/2 cups (375g) creamy peanut butter
  • 2 cups (240g) old-fashioned rolled oats
  • 1 1/4 cups (150g) all-purpose flour (or almond flour for gluten-free)
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 cup (175g) M&M’s candies
  • Optional: 1/2 cup (90g) semi-sweet chocolate chips

Instructions

  1. Preheat your oven to 350°F (175°C). Line a 9×13-inch baking pan with parchment paper, letting some overhang for easy removal.
  2. In a large mixing bowl, cream together 1 cup softened butter, 1 cup brown sugar, and 1/2 cup granulated sugar until light and fluffy, about 3-4 minutes with a mixer or 6 minutes by hand.
  3. Beat in 2 large eggs one at a time until fully incorporated, then add 1 1/2 cups creamy peanut butter and mix until smooth.
  4. In a separate bowl, whisk together 2 cups rolled oats, 1 1/4 cups all-purpose flour, 1 teaspoon baking soda, and 1/2 teaspoon salt.
  5. Gradually fold the dry ingredients into the wet ingredients using a rubber spatula until just combined, avoiding overmixing.
  6. Gently stir in 1 cup M&Ms and optional 1/2 cup chocolate chips, reserving some M&Ms to sprinkle on top.
  7. Spread the dough evenly in the prepared pan and sprinkle the reserved M&Ms on top.
  8. Bake for 25-30 minutes, checking at 25 minutes. The edges should be golden brown and the center set but slightly soft. A toothpick should come out with a few moist crumbs.
  9. Cool completely in the pan for at least 30 minutes before lifting out using the parchment overhang.
  10. Slice into 12-16 squares and serve.

Notes

Use softened (not melted) butter for best texture. Avoid overmixing after adding dry ingredients to prevent toughness. Chill dough for 15 minutes if kitchen is warm to prevent spreading. Use parchment paper for easy removal and cleanup. Tent with foil if bars brown too quickly but remain gooey inside. Let bars cool completely before slicing for best chewy texture.

Nutrition

Keywords: monster cookie bars, chewy cookie bars, M&M dessert, peanut butter bars, easy cookie bars, homemade dessert, kid-friendly dessert

Find it online: https://cooksybite.com/chewy-monster-cookie-bars-recipe-easy-homemade-m-and-m-dessert/