Monster cookies have become a favorite in our house these days. There are always discussions about how many someone ate and how many are remaining.
These cookies really are a wonderful treat. Loaded with M&M’s, chocolate chips, peanut butter, butterscotch, and oats.
The oats make them healthy, right? Well, I’m going with “yes”.
Try our Strawberry Shortcake!
Thick Monster Cookies
These Monster cookies are not your average size cookie. They are large and oh so thick! Plan ahead and chill the dough overnight. This is the key to keeping their shape and stopping them from spreading.
In the bowl of a stand mixer, cream together the room temperature unsalted butter and 1/2 cup peanut butter until smooth.
Add the brown sugar & granulated sugar, creaming together until fluffy.
Add in the eggs and vanilla extract, beating well.
Our Pumpkin Muffins are the most amazing you will ever eat!
In a separate bowl, mix the baking soda, salt, cornstarch, and flour, until combined.
Then add the dry ingredient mixture to the wet ingredients. Stir in the old-fashion oats, butterscotch chips, chocolate chips, and M&M’s until just combined.
Cover and refrigerate the dough for at least 2 hours, up to overnight. (we refrigerate overnight)
Preheat oven to 350 degrees F. Line 2 baking sheets with parchment paper or baking mat.
Drop heaping 1/4 cup-sized balls of dough onto the prepared baking sheets, about 2-3″ apart.
Bake for approximately 12-14 minutes, until golden brown. Cookies may appear slightly undone in the center; this is normal and they’ll continue to set as they cool.

See! Look at these giant Monster Cookies! So amazing!
We use the mini M&M’s because we prefer the smaller crunch but if you prefer the regular size go for it. I don’t mind.
Check out our Italian Butterball Cookies!
Monster Cookies Recipe
Monster Cookies
Ingredients
- 1/2 cup unsalted butter, softened
- 1/2 cup creamy peanut butter
- 3/4 cup brown sugar
- 1/4 cup white sugar
- 2 large eggs
- 2 teaspoons vanilla extract
- 1 teaspoon baking soda
- 1/2 teaspoon salt
- 2 teaspoons cornstarch
- 1 1/2 cups all-purpose flour
- 1 cup old-fashioned oats
- 1 cup mini M&M’s candies
- 1/2 cup mini semi-sweet chocolate chips
- 1/2 cup butterscotch chips
Instructions
- In the bowl of a stand mixer, cream together the butter and peanut butter until smooth.
- Add the brown sugar & white sugar, creaming together until fluffy.
- Add in the eggs and vanilla, beating well.
- In a separate bowl, mix the baking soda, salt, cornstarch, and flour, until combined.
- Then add the dry ingredient mixture to the wet ingredients.
- Stir in the oats, M&M’s, chocolate chips, and butterscotch until just combined.
- Cover and refrigerate dough for at least 2 hours, up to overnight. (we refrigerate overnight)
- Preheat oven to 350 degrees F. Line 2 baking sheets with parchment or silicone liners.
- Drop heaping 1/4 cup-sized balls of dough onto the baking sheets, about 2-3″ apart.
- Bake for approximately 12-14 minutes, rotating pans halfway through baking time to ensure even cooking. Cookies may appear slightly undone in the center; this is normal and they’ll continue to set as they cool.
- Cool on the baking sheet for at least 5 minutes then transfer to racks.
Nutrition
Recipe inspired by TheGirlWhoAteEverything
Comments
Suzie from Munchkin Time
August 15, 2016Thank you for posting the recipe for these delicious cookies! Perfect for parties and gatherings. – Suzie
DSTR
August 16, 2016Thank you, Suzie! 🙂
CJ Huang @ Morsels of Life
August 18, 2016These cookies look wonderful for those lazy afternoons where you can lounge around snacking, or anytime, really. 🙂 Love all the add ins!
DSTR
August 18, 2016Thank you they are really tasty! 🙂
Dee
August 21, 2016My kids would love these! Thanks for sharing at Merry Monday! 🙂
Miz Helen
August 23, 2016Your Monster Cookies will be a big hit with the little Monsters here. Your recipe looks awesome and thanks so much for sharing it with us at Full Plate Thursday. Have a great day and come back to see us real soon!
Miz Helen
Jessica Burg
August 23, 2018This is a great monster Cookie recipe! I have made it several times!
Lynda
October 12, 2018Just what I was looking for!! I bake for a children’s charity & I’m sure these will be a big hit!! Thanks for sharing!
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November 4, 2018This is now by go to recipe. I have used smarties, nuts etc always turns out great
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