These Halloween Monster Oatmeal Cookies are loaded with chocolate chips, M&Ms, and are decorated for the spooky season. They are super cute and perfect for Halloween parties.

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Spooky Halloween Monster Cookie Video Tutorial
Easy Halloween Monster Oatmeal Cookies
How do you like the little monster faces on these cute Halloween Monster Cookies? I saw the little eyeballs at the grocery store and knew I had to come up with an easy Halloween spooky cookie idea. The Halloween M&Ms and sprinkles really complete the look.
The Monster Cookies recipe is a soft and chewy oatmeal cookie that's loaded with chocolate chips. If you're looking for some more Halloween Cookie recipes, be sure to try our Jack o lantern Cookies, Chocolate Covered Wafers, or these Pumpkin Pie Bars. And to use up all that leftover Halloween Candy, try our Candy Bar Cookies, Delish!

Halloween Monster Cookie Ingredients
- Butter - I like to use unsalted butter for this recipe. Make sure to either pull it out to room temperature ahead of time or warm in the microwave for about 10 seconds at a time just until soft.
- Sugars - you will need a combination of both brown sugar and granulated sugar. I usually use light brown sugar but you could use dark brown sugar if you prefer the flavor.
- Eggs - any kind of large eggs will work. It's best if they are room temperature so you can pull out ahead of time or run under warm water for a minute or so.
- Vanilla Extract - pure vanilla extract tastes best.
- Flour - this recipe calls for all-purpose flour.
- Baking Soda and Baking Powder - this gives the cookies a little bit of lift and chew.
- Salt - I like to use sea salt.
- Oats - you’ll want to use old-fashioned rolled oats for these cookies. Don't try and use instant oats or steel cut oats because the texture will not be right!
- Chocolate Chips - you can use really any type of chocolate chips - semi sweet, milk chocolate, or even butterscotch would all taste great.
- Sprinkles - if you can find black and orange sprinkles, use those.
- M&Ms - around Halloween you can usually find Halloween colored M&Ms.
- Candy Eyes - you should be able to find some in the baking aisle at the store.

Optional Add-Ins
- Nuts: just about any kind! Toast them in a saute pan for about 5 minutes first, or lightly toast them in the oven before adding to the dough.
- M&M’s: plain, peanut, coconut, peanut butter, all sizes, shapes, and flavors! A really fun and cute addition.
- Dried Fruit: cranberries, raisins, blueberries, strawberries, flaked coconut (super yummy when it’s toasted), and even sliced & dried bananas!
- Extra Crunch: try crushing some whoppers, crushed potato chips, or pretzels,
- Flavored Morsels: butterscotch chips, chocolate chips, caramel bits, or Heath pieces.
How to make this cute Monster Cookie Recipe
- Mix the wet ingredients. In the bowl of a stand mixer, add the room temperature butter and sugars. Using the paddle attachment, beat until fluffy - about 3 minutes. Slowly add the eggs one at a time, scraping down the bowl as needed. Add the vanilla and mix well.
- Add the dry ingredients. In a separate large bowl, combine the baking soda, baking powder, salt, and rolled oats, and mix until everything is combined. Add the dry ingredients to the butter mixture and mix until almost combined. Add the chocolate chips and mix again until all ingredients are combined.
- Portion. Scoop and roll dough into 1 ¼" balls. Place Halloween sprinkles into a small bowl and roll each dough ball in them before placing on a greased baking sheet about 2" apart.
- Bake. Bake in a preheated 325 degree oven for 10-13 minutes, or until lightly golden brown and set. Remove from the oven and immediately add the candy eyeballs and M&Ms before letting the cookies cool on the pan for a few minutes.
- Cool and serve. Transfer to a wire cooling rack to cool completely. Serve immediately or store in an airtight container for up to 4 days. Enjoy!

Storing Oatmeal Monster Cookies
Cookie Dough
- Fridge- You can make the cookie dough ahead of time. It will last in the fridge for a couple of weeks in an airtight container.
- Freezer- Like most cookie doughs, this dough can be frozen and baked at a later date. Simply scoop into balls and place on a parchment-lined pan, and freeze until solid. Once frozen, remove from the cookie sheet and place in a freezer bag. They can be stored in the freezer for 3-4 months.
- To Bake Frozen Cookies: Defrost for an hour or two in the fridge and bake as directed. If the dough is very cold, you may need to add a minute or two of cook time.
Baked Cookies
- Room Temperature- If you want to store the cookies already baked, just place them in a container with a lid. They will stay fresh for a few days.
- Freezer- If you haven’t tried this method, you’re missing out. Cookies freeze really well and are so fun to grab out of the freezer and enjoy. Let them thaw for a few minutes, and you’ll have an extra chewy cookie to enjoy. Cookies can remain in the freezer, in an airtight container, or freezer bag for up to 3 months.

Halloween Monster Cookie Recipe
Ingredients
- 1 cup Butter room temperature
- 1 cup Brown Sugar packed
- 1 cup Sugar
- 1 tsp Vanilla Extract
- 2 large Eggs room temperature
- 1 tsp Baking Soda
- ½ tsp Baking Powder
- 2 cups All-Purpose Flour
- ½ teaspoon Salt
- 2 cups Old-Fashioned Rolled Oats
- 1 cup Chocolate Chips
For Decorating Monster Cookies
- Halloween Sprinkles
- 1 pkg Halloween M&M's (Ghoul's mix)
- 1 pkg Wilton's Candy Eyeballs
Instructions
- Preheat oven to 325 degrees.
- In the bowl of a stand mixer, add the room temperature butter and sugars. Using the paddle attachment, beat until fluffy - about 3 minutes. Slowly add the eggs one at a time, scraping down the bowl as needed. Add the vanilla and mix well.
- In a separate large bowl, combine the baking soda, baking powder, salt, and rolled oats, and mix until everything is combined. Add the dry ingredients to the butter mixture and mix until almost combined. Add the chocolate chips and mix again until all ingredients are combined.
- Scoop and roll dough into 1 ¼" balls. Place Halloween sprinkles into a small bowl and roll each dough ball in them before placing on a greased baking sheet about 2" apart.
- Bake in the preheated oven for 10-13 minutes, or until lightly golden brown and set. Remove from the oven and immediately add the candy eyeballs and M&Ms before letting the cookies cool on the pan for a few minutes.
- Transfer to a wire cooling rack to cool completely. Serve immediately or store in an airtight container for up to 4 days. Enjoy!
Nutrition
More Of The Best Cookie Recipes
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This oatmeal cookie, monster cookie recipe makes really adorable Halloween cookies. The cute monster cookies are soft and chewy and are loaded with chocolate chips and Halloween M and M's.
Amy
There are many possibilities, but the most common are probably either your pan was too hot or you could have forgotten the baking soda/powder.
Essie
Made these today!!! with LO Baker Helper????????????????
Sandra
I made these and they tasted great! My only problem was they came out very flat. Any suggestions? Thanks!