A batch of freshly baked monster cookie bars in a white and blue baking dish, cut into squares. The bars are golden brown with visible oats, chocolate chips, and colorful candy-coated chocolates.

Monster Cookie Bars Recipe

If you love the classic taste of monster cookies but want an easier, no-fuss way to bake them, these Monster Cookie Bars are the perfect treat! Packed with peanut butter, oats, chocolate chips, and colorful candy-coated chocolates, they’re chewy, rich, and full of flavor in every bite. Best of all, they’re naturally gluten-free since they don’t contain any flour—just wholesome oats holding everything together. Whether you’re making them for a church potluck, bake sale, or a sweet treat at home, these bars are guaranteed to be a crowd-pleaser. Get ready to enjoy a dessert that’s as fun as it is delicious!

A batch of freshly baked monster cookie bars in a white and blue baking dish, cut into squares. The bars are golden brown with visible oats, chocolate chips, and colorful candy-coated chocolates.

Monster Cookie Bars Recipe

Prep Time: 10 minutes
Cook Time: 17 minutes
Total Time: 27 minutes

Ingredients

  • 1/2 cup margarine (or butter)
  • 1 cup packed brown sugar
  • 1 cup granulated sugar
  • 1 1/2 cups creamy peanut butter
  • 3 large eggs
  • 2 tsp vanilla extract
  • 4 1/2 cups quick oats
  • 1 teaspoon baking soda
  • 1 cup M&Ms
  • 1 cup chocolate chips

Instructions

  1. Preheat oven to 350°F. Grease 9x13" pan (or cookie sheet if you want thinner bars) with cooking spray.
  2. In a large bowl or stand mixer, beat butter, brown sugar, granulated sugar, and peanut butter until fluffy.
  3. Add eggs and vanilla, then mix.
  4. Stir in oats and baking soda until combined.
  5. Fold in M&M’s and chocolate chips.
  6. Spread dough evenly onto pan.
  7. Bake for 17-20 minutes, until edges are lightly browned. The center will look soft but will set as it cools.
  8. Let cool for at least 1 hour before cutting to allow bars to firm up. Do not overbake!
Nutrition Information:
Yield: 40 Serving Size: 1
Amount Per Serving: Calories: 194Total Fat: 10gSaturated Fat: 3gTrans Fat: 0gUnsaturated Fat: 6gCholesterol: 15mgSodium: 108mgCarbohydrates: 23gFiber: 2gSugar: 16gProtein: 4g

 

Monster Cookies Bars Batter

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