Monster Cookies are jammed packed with goodies like: oatmeal, peanut butter, chocolate chips and m&m candies! The ultimate cookie loaded with delicious flavor and texture. This recipe yields 30 cookies in about an hour.

Monster Cookies

Meet the ultimate cookie.

At least in my world it is. This thick, chewy (thanks you, oatmeal) and decadent cookie also has a crisp and buttery exterior. And it doesn’t stop there. I like to use crunchy peanut butter instead of creamy, just so the cookies have even more texture.

Monster Cookies

It has just about everything a person could wish for in a cookie. If you love peanut butter, oatmeal, chocolate chips and M&M’s… well, this cookie is for you.

ingredients for Monster Cookies

To Make These Monster Cookies You Will Need:

  • old fashioned rolled oatsLends flavor and chewy texture.
  • unbleached all-purpose flourThe base for the cookie dough.
  • whole wheat flourAdds subtle and mouthfeel.
  • baking sodaCreates a gas while baking which helps the cookies rise.
  • fine saltUse either sea salt or pink himalayan.
  • unsalted butterLends richness, tenderness and structure to cookies.
  • crunchy peanut butterAdds nutty flavor, richness and texture.
  • dark brown sugarLends a richer, more complex flavor.
  • granulated sugarAdds sweetness and also makes cookies brown and crisp when baked.
  • eggsAdd structure, leavening and flavor.
  • pure vanilla extractAdds warmth and enhances all of the other flavors in this recipe.
  • M&M candiesLends pops of color and pockets of chocolate.
  • milk chocolate chipsFor additional chocolaty goodness.

Dry ingredients in bowl.

Preheat your oven to 350℉ (or 180℃) and line a rimmed metal baking sheets with parchment or silicone mats.

In a bowl, measure and add 2-1/2 cup old fashioned oats, 1 cup unbleached all-purpose flour, 1/2 cup whole wheat flour, 2 teaspoons baking soda and 1/2 teaspoon kosher salt.

Stir dry ingredients to combine.

Stir to combine and set off to the side.

Add butter, peanut butter and both sugars to bowl of stand mixer.

Next in the bowl of your stand mixer, fitted with the paddle attachment, measure and add 1 cup (2 sticks) unsalted butter, 1 cup crunchy peanut butter and 3/4 cup each of dark brown sugar and granulated sugar.

Mix until combined.

Mix until combined and fluffy.

Add eggs one at a time.

Next add 1 egg at a time, mixing well after each addition.

pour in vanilla extract.

With the second egg, add in 1 teaspoon vanilla extract.

gradually add in flour/oat mixture

Add half of the flour/oat mixture and mix until just combined.

Mix until just combined.

Then add the remaining, stopping when just combined.

Add chocolate chips and mix to incorporate.

Measure and add in 1 cup milk chocolate chips

Add in m&ms

Lastly, add in 2-1/2 cups M&M’s candies,

Mix by hand to incorporate

Mix by hand using a spatula.

use a scoop to measure out dough onto prepared pan.

Using a 3 tablespoons scoop, measure out 3 tablespoons of cookie dough and place onto a parchment lined rimmed, metal baking sheet.

just baked monster cookies

Bake on the middle rack of your preheated oven for 12 to 14 minutes.

Monster Cookies on wire rack

Once baked, transfer. the cookies to a wire rack and let cool.

…before inhaling. 😏

Crisp, peanut buttery, crunchy candy coated oatmeal goodness. All packed into one amazing cookie!

Monster Cookies

How to Store Monster Cookies:

Once the cookies have completely cooled, store them in an air-tight container for up to a week.

How to Freeze Monster Cookies:

Portion out the dough and freeze the raw dough as is, placing them closed together on a lined baking sheet. Place into your freezer and freeze until frozen solid. Transfer to a freezer safe container or baggie and store up to 2 months. Bake desired amount of cookies following the recipe instructions. There’s no need to thaw before baking.

For more cookie recipes click here.

Monster Cookies

Enjoy! And if you give this Monster Cookies recipe a try, let me know! Snap a photo and tag me on twitter or instagram!

Monster Cookies

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Yield: 30 cookies

Monster Cookies

Monster Cookies are jammed packed with goodies like; oatmeal, peanut butter, chocolate chips and m&m candies! The ultimate cookie loaded with delicious flavor and texture.

Ingredients

  • cups old fashioned rolled oats
  • 1 cup unbleached all-purpose flour
  • 1/2 cup whole wheat flour
  • 2 teaspoons baking soda
  • 1/2 teaspoon fine salt, like sea salt or pink himalayan
  • 1 cup unsalted butter, softened to room temperature
  • 1 cup peanut butter, crunchy
  • 3/4 cup dark brown sugar
  • 3/4 cup granulated sugar
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 1 cup milk chocolate chips
  • cups M&M candies

Instructions 

  • Preheat your oven to 350℉ (or 180℃) and line a rimmed metal baking sheets with parchment or silicone mats.
  • Combine oats, flours, baking soda and salt in a bowl. Then set off to the side.
  • In the bowl of your stand mixer, fitted with the padle attachment, add the softened butter, peanut butter and both sugars. Mix until ight and creamy.
  • Add in one egg at a time, adding 1 teaspoon vanilla extract with the final egg.
  • Then add in half of the oat and flour mixture, mixing until just combined. Repeat with the remaining oat/flour mixture.
  • Mix in the chocolate chips and then fold in the M&M's by hand using a spatula.
  • Use a 3-tablespoon scoop to measure out each cookie. Space 10 scoops of cookie dough a few inches apart on the prepared pan. Bake on the middle rack of your preheaetd oven for 12 to 14 mintues (rotating halfway through).
  • Once the edges are golden, remove and transfer to a wire cooling rack and repeat with remaing dough.

Notes

Nutrition Disclaimer: All information presented on this site is intended for informational purposes only. I am not a certified nutritionist and any nutritional information shared on SimplyScratch.com should only be used as a general guideline.
Serving: 1cookie, Calories: 290kcal, Carbohydrates: 34g, Protein: 5g, Fat: 16g, Saturated Fat: 8g, Polyunsaturated Fat: 2g, Monounsaturated Fat: 4g, Trans Fat: 0.3g, Cholesterol: 30mg, Sodium: 163mg, Potassium: 121mg, Fiber: 2g, Sugar: 22g, Vitamin A: 231IU, Vitamin C: 0.1mg, Calcium: 35mg, Iron: 1mg