Cake Mix Monster Cookies

4.8 / 5 (4 reviews)

Cake Mix Monster Cookies are an easy and fun twist to the classic monster cookie. A yellow cake mix, peanut butter, oats, chocolate chips, and m&m's create a thick, soft-baked, and chewy cake mix monster cookies that are so easy to make.

By: Togetherasfamily (via Togetherasfamily)
Original Publish: Apr 18, 2019
Last Updated: Mar 1, 2026
Prep: 5 mins
Cook: 12 mins
Yields: 30, 30 cookies

Nutrition Facts

180 kcalCalories
Finished Cake Mix Monster Cookies

Ingredients

Instructions

  1. Heat oven to 350 degrees. Line cookie sheet with parchment paper or spray with cooking spray. 

  2. In large mixing bowl, combine cake mix, brown sugar, butter, peanut butter, water, and egg. Beat with a handheld blender on medium speed until well combined. 

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Chef's Notes

NotesI used a box of Pillsbury supermoist yellow cake mix.
 
I have only ever used the quick oats in this recipe. They have a finer texture so if you use old-fashioned oats the oat flakes will be larger and give more texture and chew to the cookie. 
 
I would recommend not using the all-natural peanut butter in this recipe. It tends to dry out baked goods. But again, you can use it I just can't promise the outcome will be good. 

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Reviews from the Original Source

Joyce Miller ★ 5.0/5

My go to cookie. You can adjust your add-ins to your liking. I usually do chocolate chips and either white or peanut butter chips. Then I press some m&m’s on top.

Farmers Wife ★ 5.0/5

These were GREAT!!!
Only 2 substitutions, because I didn't have any M&M's. I used Craft caramel bits and I added 1C of coconut for more texture.
These were amazing.
Thank you for sharing.

J ★ 4.0/5

Came out good with natural pb, added a teaspoon more of water to dough. Exterior was a little drier/crunchier.

Joyce ★ 5.0/5

My family’s favorite cookie ever. Grandson loves helping to make these and they are so easy.

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