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Monster Cookies Recipe – A soft and chewy cookie bursting with colorful M&Ms and melted chocolate chips, fresh from the oven. The perfect sweet treat for chocolate lovers!

Easy Monster Cookies Recipe

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Thick, chewy monster cookies recipe packed with peanut butter, oats, chocolate chips, and colorful M&Ms! These oversized treats are crispy on the edges, soft in the middle, and ready in just 30 minutes.
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Prep Time 15 minutes
Cook Time 12 minutes
Total Time 27 minutes
Servings: 24 large cookies
Course: Dessert
Cuisine: American
Calories: 375
Ingredients Equipment Method Nutrition Notes

Ingredients
  

Wet Ingredients
  • 3 large eggs room temperature
  • 1¼ cups light brown sugar packed
  • 1 cup granulated sugar
  • 1 tablespoon vanilla extract
  • 2 cups creamy peanut butter
  • ½ cup unsalted butter softened
Dry Ingredients
  • 4½ cups old-fashioned rolled oats
  • 1 cup all-purpose flour
  • 2 teaspoons baking soda
  • ½ teaspoon salt
Mix-ins
  • 1 cup semi-sweet chocolate chips
  • 1 cup M&Ms
  • ½ cup mini M&Ms for topping

Equipment

  • Large mixing bowl
  • Electric mixer (stand mixer preferred, but hand mixer works too)
  • Measuring cups and spoons
  • Cookie sheets
  • Parchment paper or silicone baking mats
  • Cookie scoop (3-tablespoon size recommended)
  • Cooling rack

Method
 

  1. Preheat oven to 350°F (175°C). Line baking sheets with parchment paper.
  2. Beat eggs, brown sugar, and white sugar until well combined (2 mins).
  3. Add vanilla, peanut butter, and butter. Mix until creamy.
    Monster Cookies Recipe – Creamy peanut butter mixture whipped to perfection, forming the rich and flavorful base for delicious, chewy monster cookies.
  4. Whisk together oats, flour, baking soda, and salt.
  5. Gradually mix dry ingredients into wet mixture.
  6. Fold in chocolate chips and regular M&Ms.
  7. Scoop 3-tablespoon portions onto baking sheets.
    Monster Cookies Recipe – Scooping perfectly portioned cookie dough with chocolate chips onto a parchment-lined baking sheet, ready to bake into chewy, delicious treats.
  8. Top with mini M&Ms.
  9. Bake 12-14 minutes until edges are lightly golden.
  10. Cool 5 minutes on sheet, then transfer to rack.

Nutrition

Calories: 375kcalCarbohydrates: 46gProtein: 9gFat: 19gSaturated Fat: 7gTrans Fat: -1gCholesterol: 31mgSodium: 235mgFiber: 2.5gSugar: 32g

Notes

  • Don't overbake - centers should look slightly underdone
  • Use room temperature ingredients
  • Chill dough if too soft
  • Store in airtight container up to 5 days
  • Freezer-friendly up to 3 months

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