These Pumpkin Monster Cookies are just in time for pumpkin season, with peanut butter, oats, and M&M’s amped up a notch with the addition of pumpkin & spices.

If you love a classic monster cookie with all the mix-ins, these pumpkin monster cookies need to be on your fall baking list! They are chewy just like the original but with a pumpkin spice twist for the season.

a hand holding one Pumpkin Monster Cookie with a bite taken out of it.

I love cooking with pumpkin. Love it! Bread, cake, donuts, really in any shape or form.

Last week I was craving my favorite Monster Cookies and I had some leftover pumpkin in the fridge from making bread for my mom. I decided to just throw it in to see how it would taste.

I wanted to keep a lot of the mix-ins like chocolate chips, M&Ms, oats but give the recipe a fall twist with the pumpkin puree. Let’s just say this is my favorite kind of baking experiment!

A stack of cookies.

Recipe Notes

First, I reduced the amount of peanut butter and just substituted it with pumpkin.

Because the peanut butter was still strong, I added some traditional pumpkin pie spices to kick this cookie up a notch and it turned out amazing.

I love that they’re soft and chewy like the original and all of the flavors just work! Honestly, I was a little worried about how the pumpkin spices would go with the peanut butter and M&M’s but it is amazing! And just in time for fall.

Ingredients

  • Softened butter
  • Brown sugar
  • White sugar
  • Eggs
  • Canned pumpkin puree
  • Peanut butter
  • Vanilla extract
  • Honey
  • Baking soda
  • Pumpkin pie spice
  • Rolled oats
  • Flour
  • M&Ms
  • Chocolate chips
overhead shot of the cookie dough in a bowl.

How do you make Pumpkin Monster Cookies?

Preheat oven to 350 degrees F (175 degrees C).

In a large mixing bowl or stand mixer cream together butter, sugar, and eggs.

Add the remaining ingredients in order and mix until well combined.

Use a cookie dough scooper, add 6 scoops of dough onto your ungreased cookie sheet placing a couple of inches apart.

Bake for 10-12 minutes or until the cookies are a light golden brown. The center will look doughy when they’re done, so don’t leave them in too long. 11 minutes is perfect in my oven. Cool, serve, and enjoy!

Recipe Tips

Sometimes I use fall-themed M&Ms for this recipe. Or, you could swap the M&M candies for Reese’s pieces.

Rolled oats are the secret to making chewy cookies. I don’t recommend using quick oats.

Store the cooled cookies in an airtight container at room temperature. You can also freeze the cookies.

I love how these Pumpkin Monster Cookies turned out. They still have the classic chewy texture like pumpkin oatmeal cookies, but with all the fun mix-ins like a monster cookie!

So grab a bag of some M&M’s and get started. Pumpkin season just got a whole lot better. Enjoy! XOXO San

overhead shot of a stack of cookies.

More Pumpkin Cookie Recipes

Try my other favorite pumpkin-flavored cookies: 

Don’t forget to pin this to your favorite Pinterest board to save for later!

pumpkin monster cookies pinterest photo collage.

Pumpkin Monster Cookies

Prep: 5 minutes
Cook: 15 minutes
Total: 15 minutes
Servings: 72
Calories: 132 kcal
These Pumpkin Monster Cookie are just in time for pumpkin season, with peanut butter, oats and M&M’s amped up a notch with the addition of pumpkin & spices.
a pumpkin monster cookie.

Ingredients
 

  • 1/2 cup butter softened
  • 1 1/2 cups brown sugar packed
  • 1 cup white sugar
  • 3 eggs
  • 3/4 cup canned pumpkin puree
  • 3/4 cup peanut butter
  • 1 teaspoon vanilla extract
  • 1 tablespoon honey
  • 2 teaspoons baking soda
  • 1 1/2 teaspoons pumpkin pie spice
  • 4 1/2 cups rolled oats
  • 2 cups flour
  • 1 1/2 cups M&Ms
  • 1 1/2 cups chocolate chips

Instructions
 

  • Preheat oven to 350° F (175° C).
  • In a large mixing bowl or stand mixer cream together butter, sugar and eggs.
  • Add pumpkin puree, peanut butter, honey, and vanilla extract and combine.
  • Mix in the oats, followed by the pumpkin pie spice, baking soda, and flour.
  • Stir in the chocolate chips and m&ms.
  • Use a cookie dough scoop, place 9 balls of dough on the baking sheet. It will be a bit stickier than a normal cookie l dough.
  • Bake for 10-13 minutes or until the edges of the cookie is a light golden brown. Cool, serve and enjoy!
Serving: 1cookieCalories: 132kcalCarbohydrates: 20gProtein: 2gFat: 5gSaturated Fat: 2gTrans Fat: 1gCholesterol: 11mgSodium: 64mgPotassium: 54mgFiber: 1gSugar: 13gVitamin A: 465IUVitamin C: 1mgCalcium: 20mgIron: 1mg
a pumpkin monster cookie.
Tried this recipe?Let us know what you think!

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19 Comments

  1. Hey Sandra 🙂 These cookies look divine and I can’t wait to make them .. could you please tell me what spices you used as I don’t see any listed in the recipe ….. Thanks so much 🙂

  2. In the writting associated with the recipe, she tells how she amped up the flavor with pumpkin spice. Pumpkin spice is a pre mixed spice mix sold in the spice isle in the grocery store. Granted it’s missing from the actual ingredients list. But I’d just start with 1/2 teaspoon, taste the dough and if you want more then add more.

  3. 5 stars
    These cookies are amazing! I added a cup of peanut butter chips to my batter because my husband loves PB, and subbed in natural crunch almond butter for the peanut butter. They turned so yummy. Perfect for the fall.

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