Cake Mix Monster Cookies

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Cake Mix Monster Cookies are chock full of everything you love: peanut butter, chocolate chips, oats, and M&Ms! Plus, they’re made with a cake mix so they’re super simple to make.

Cake Mix Monster Cookies Ingredients

The beauty of these monster cookies is they are super versatile. You can swap out the chocolate chips and candies for anything: peanut butter chips, butterscotch chips, candy bar pieces, or really anything else that you’re craving. THey’ll be amazing no matter what sweet thing you put in ’em!

  • box yellow cake mix (just use the brand that you normally buy to make a cake)
  • brown sugar
  • butter
  • peanut butter
  • water
  • egg
  • mini m&ms (you can use regular sized ones too, but I like the texture of mini M&Ms)
  • mini chocolate chips
  • quick oats

How to Make Cake Mix Monster Cookies

These cake mix monster cookies are so easy to make. I like using cake mix in my cookies as a shortcut. I don’t have to measure out all-purpose flour, salt, sugar, or any rising agent: it’s all already in there!

To make these cookies, you’ll start by preheating your oven to 350°F. 

You can make your dough in a stand mixer(I am in love with my KitchenAid) or use a large bowl and a hand mixer if you like. You could also use a spatula or wooden spoon, but you’re trying to make cookies, not work out, lol. 

Anyway, combine the cake mix, brown sugar, butter, peanut butter, water, and egg in your bowl and mix until well combined. Stir in the mini M&Ms, chocolate chips, and oats, and combine gently. 

Prepare your cookie sheet by spraying it with nonstick spray, or lining it with parchment paper, and scoop your cookie dough onto the sheet, leaving 2-3 inches in between each cookie. Make for 12 to 13 minutes or until set. let the cookies cool on the pan for just two minutes and then transfer them to a cooling rack to let them cool. Devour!!!

My Favorite Cookie Recipes

I’m a huge cookie fan, so I’ve got quite a few of them on my site! A few of my favorites include:

Peppermint Oreo Cookies

Raspberry Thumbprint Cookies

Hot Cocoa Cookies

Cake Mix Monster Cookies

0 from 0 votes
Recipe by Julia Pacheco Course: DessertDifficulty: Easy


Prep time


Cooking time




  • 1 1 box yellow cake mix

  • 1/2 cup 1/2 brown sugar

  • 1 1/2 1 1/2 sticks butter, softened

  • 1/2 cup 1/2 peanut butter

  • 3 tbsp 3 water

  • 1 1 egg

  • 1/2 cup 1/2 mini m&ms

  • 1/2 cup 1/2 mini chocolate chips

  • 2 cups 2 quick oats


  • Preheat oven to 350 degrees F.
  • To a large bowl or electric stand mixer, add in the cake mix, brown sugar, butter, peanut butter, water, and egg, and mix until well combined. Stir in the mini m&ms, chocolate chips, and oats.
  • Line a cookie sheet with parchment paper or spray with non-stick spray. Using a cookie scoop, scoop the dough and place onto the cookie sheet, leaving 2-3 inches in between each cookie. Bake for 12-13 minutes. Let cool on the cookie pan for 2 minutes then transfer to a cooling rack and enjoy!

One Comment

  1. Could I use a box of chocolate cake mix instead of yellow for this recipe? Thank you

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