Monster Cookies: Best Ever Recipe
If Halloween had a cookie mascot, it would be Monster Cookies. Besides having the name to fit the part (what better time for monsters than Halloween?) Monster Cookies are loaded with chocolate and peanut butter candies, the prize flavors of the trick-or-treat assortment.
Back in the glory days of trick-or-treating, my sisters and I would spread our haul of candy on the carpet before us, sort it into piles based on personal priority, then commence the Great Halloween Candy Swap. Our living room was a mini-incubator for the free market at its finest. While my sisters opted for anything sour or fruity, I was—and still am—all about the chocolate and peanut butter.
I’m a chocolate + peanut butter lover to the core, and I loaded these Monster Cookies with both flavors. For the unfamiliar, a Monster Cookie is a peanut butter oatmeal cookie that is packed with yummy mix-ins, most traditionally M&M candies and chocolate chips. After experimentation, I am pleased to report that I have created the Ultimate Best Ever Blow-Your-Mind Monster Cookies. Pin this recipe now friends—this is the only Monster Cookie recipe you will ever need.
That statement is a total superlative, and I’m standing by it.
Our Monster Cookies begin with the softest, fluffiest peanut butter oatmeal cookie recipe I have ever created. Honestly, we could leave out all of the mix-ins, and we would still have a fabulous peanut butter oatmeal cookie. This is Halloween, however, candy is a must. Let’s packed our perfect peanut butter-oatmeal base with semi-sweet chocolate chips, dark chocolate M&Ms, and (for even more peanut butter flavor) peanut butter chips. Double the peanut butter, double the chocolate, double the delectability.
Don’t even pretend you are going to eat just one. Monster Cookies are not single-serving territory. I recommend pouring an extra large glass of milk to keep pace, these Monster Cookies are that outstanding. Plus look how little and fun they are! Their cuteness alone is reason enough to go back for more.
As I shared with my Peanut Butter Cake with Chocolate Chips, when it comes to chocolate and peanut butter, I am loud and proud about flavor, and these Monster Cookies are no exception. Though I chose dark chocolate M&Ms, feel free to pick your favorite M&M flavor (or use a mix!)
Monster Cookies are also a tasty vehicle for any extra Halloween candy you have on hand. Try swapping in chopped Reeses, Twix, Hershey bars, or Butterfingers. The amazingly soft and fluffy peanut butter oatmeal Monster Cookie base is a delightful canvas for your candy favorites.
Some of us may be too old to go knocking door to door on Halloween, but that doesn’t mean we shouldn’t treat ourselves. Let’s start with a big batch of softy, chewy Monster Cookies. No tricking here friends—these are the best Monster Cookies I have ever tasted, and I’d bet my entire stash of peanut butter and chocolate that they will be yours too.
My candy is on the line! Give these Monster Cookies a try.
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Best Ever Monster Cookie Recipe: Soft, fluffy peanut butter oatmeal cookies loaded with chocolate chips, M&M candies, and peanut butter chips. Feel free to sub in your favorite candy to make them your own and don't be surprised when they disappear!
Yield: 36-40 small (2-inch) cookies
Prep Time: 20 minutes
Cook Time: 10 minutes
Total Time: 30 minutes
- 1/2 cup (1 stick) unsalted butter, softened
- 3/4 cup firmly packed dark brown sugar
- 1/4 cup granulated sugar
- 1/2 cup creamy peanut butter
- 1 large egg, at room temperature
- 1 teaspoon vanilla extract
- 1/2 cup + 2 tablespoons white whole wheat flour
- 1/2 cup all purpose flour
- 1/2 teaspoon baking soda
- 1/4 teaspoon kosher salt
- 1 cup old fashioned rolled oats
- 3/4 cup M&Ms (plain, dark chocolate, or any kind you like)
- 1/2 cup semi-sweet chocolate chips
- 1/2 cup peanut butter chips
- Place rack in center of oven and preheat to 350ºF.
- In a large mixing bowl, cream butter, brown sugar, and granulated sugar until light and fluffy, about 3 minutes. Add peanut butter and beat until fluffy again, about 2 minutes. Beat in egg and vanilla until combined.
- In a separate bowl, stir together the white whole wheat flour, all purpose flour, baking soda, and salt. With the mixer on low, gradually beat the flour mixture into the peanut butter mixture until fully combined. Slowly beat in the oats. By hand, stir in the M&Ms, chocolate chips, and peanut butter chips. If time allows, chill dough for 30 minutes or overnight.
- Drop dough by rounded teaspoons onto a cookie sheet lined with parchment paper or a silpat mat (or leave cookie sheet ungreased.) Bake for 10 minutes until lightly golden brown (cookies may appear underdone). Let rest on cookie sheet for 5 minutes, then transfer to a wire rack to cool. Serve with a big glass of cold milk.
Store leftover Monster Cookies in an airtight container for up to 1 week.