Brownie Doctor: Monster Cookie Brownies

Remember when we made Oatmeal Cookie Dough Whoopie Pies a couple weeks ago? I don't know about you, but I couldn't get that oatmeal cookie dough frosting out of my head. I felt like by adding oats to the tried-and-true cookie dough frosting situation we had thrown open the door to a whole new world of cookie dough-based possibilities.

The first possibility that came to mind? Adding peanut butter. Because obviously. I don't know about you, but Audrey and I will and do add peanut butter to almost anything edible. We once tried a peanut butter cheeseburger. It was kind of a game changer, not gonna lie.

Once I (mentally) added peanut butter, it all came together. Oats + peanut butter leads me to only one conclusion: Monster Cookies. And it gets even better, because we're putting them on top of brownies. Is your heart beating faster? Because mine is. 

To achieve maximum monster cookie effect, I stuffed these brownies chock full of peanut butter chips and M&M's before frosting them with peanut buttery cookie dough frosting textured with finely-ground oat flour. Never let it be said that I baked anything by halves.

These brownies are stuffed (seriously, stuffed) with chocolatey, oaty, peanut buttery flavor. Every single bite bursts with moist brownie, peanut butter chips, and M&M's, wrapped up in a fluffy floud of cookie dough frosting. Yes, it's a lot. Yes, I can't get enough.

If you're craving some serious peanut butter/chocolate scrumptiousness, these are the brownies for you. So basically...these are the brownies for everyone.

- Molly

Monster Cookie Brownies


1 box brownie mix

1/2 cup M&M's

1/2 cup peanut butter chips

Cookie Dough Frosting:

1 stick unsalted butter, softened

2/3 cup peanut butter

1/3 cup brown sugar

1/3 cup oat flour**

1/2 teaspoon salt

2 teaspoons vanilla extract

2 cups powdered sugar

4 tbsp heavy whipping cream

**You can make oat flour by putting 1/3 cup quick oats in your food processor and processing until it becomes a fine powder.

To make the brownies: Mix brownies batter according to box instructions. Fold in M&M's and peanut butter chips. Bake according to box instructions.

To make the frosting: In a large bowl, beat together the butter, peanut butter, and brown sugar until creamy and fluffy, about 2-3 minutes. Beat in the flour, salt, and vanilla. Gradually beat in the powdered sugar. Beat in the heavy cream and beat another 1-2 minutes or until the frosting is fluffy.