It is my birthday week and although part of me hates to admit it…one of my favorite {store bought} snacks is a Cosmic Brownie.  I love the soft fudgy brownie with chocolate frosting and topped with colored miniature chips.  They are delicious in the most sinful way!  When I thought about what I wanted for my birthday dessert, I of course decided on a cookie.  Shocking, I know.  Then I thought it would be extra fun to turn my favorite prepared brownie into a cookie people could make at home.  I sure love when a plan comes together because this Cosmic Brownie Cookie recipe is so much fun and so darn fabulous!  Happy Birthday to me!

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If you love cookies made from a mix, then try some of these recipes… Mexican Hot Chocolate Cookies, Kentucky Butter Cake Cookies and Texas Sheet Cake Cookies.

I started with a brownie mix because I needed something simple.  This week has been a little crazy.  Between traveling for a conference and a big food demonstration to prep for…I have been low on time.  Being able to turn a boxed mix into a cookie is such a time saving way to bake.

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How to make a Brownie Mix Cookie

To get a little extra structure to the cookie and be sure that they turned out soft and chewy, I added 3 tablespoons of flour to the brownie mix.  Use a whisk to mix them together and take out any lumps.

Whisk together the eggs and oil before adding it to the dry ingredients.  This helps everything incorporate together well.

Mix the dough by hand until everything is well combined {the dough will be pretty thick}.  I recommend using a cookie scoop to make your mounds.  This will insure that all of the cookies are the same size and they bake up nicely.

Bake the cookies until the edges are set.  The middle will still be a little soft but that’s alright.  Remove them from the oven and let them cool on the warm cookie sheet for 5-10 minutes or until they are set up.  The most important thing to remember is not to over-bake the cookies.

These sweet little multi-colored mini chips can be found by the sprinkles in the cake section of the grocery store.

Homemade Chocolate Frosting

The frosting is made with butter, cocoa, powdered sugar and heavy cream.  I used a hand held mixer to get everything incorporated well and smooth.

Once the cookies are just cooled, begin to take a teaspoon {or so} of frosting and spread it on each cookie.  Then liberally sprinkle the top with the mini chips.

The very best part is the first bite!  Look at the center of that baby.  Just like a perfect brownie but in a cookie form!

I couldn’t help but get one more shot.  The colorfulness of these cookies is so much fun.  They would be the perfect dessert for any celebration.

Course Dessert
Prep Time 10 minutes
Cook Time 25 minutes
Total Time 35 minutes


  • 1 box dry brownie mix
  • 2 eggs
  • 1/4 cup vegetable oil
  • 3 tbsp flour

Chocolate Frosting

  • 1/2 cup butter {softened}
  • 2 cups powdered sugar
  • 1/2 cup cocoa powder
  • 1/3 cup heavy cream
  • 1/2 tsp vanilla



  1. Preheat oven to 375 degrees.  Combine the brownie mix and flour in a bowl and whisk until the ingredients are incorporated and any lumps are removed.  In a separate bowl combine the eggs and oil, whisk until the ingredients are combined and add it to the dry ingredients.  Using a wooden spoon, stir the ingredients together until everything is well combined and thick.  Scoop heaping tablespoons of dough onto a parchment {or silpat} lined baking sheet.  Bake for 8-9 minutes or until the edges are set, they will appear to be a little under cooked but that is alright.  Remove cookies from the oven and let them cool on the cookie sheet until set {5-10 minutes}.


  1. Add the frosting ingredients to a large bowl and combine with an electric mixer {I used a hand held mixer} until the frosting is totally combined and smooth.  Add additional heavy cream if the frosting is too thick.


  1. Once the cookies are cooled {or almost completely} begin frosting the top of each cookie with a teaspoon of frosting and sprinkle with mini chips.


3 Piece Baking Set

Cookie Scoop Set