Out Of The Box Brownies: Magical brownie recipes that start with a box

Frankenstein’s Monster Brownies

October 09, 2012 By: Denise Leo, Global Brownie Ambassador Category: Creative, Fun For Kids, Holiday, Mint, Nut-Free, Off the Beaten Path, Products


The mad-scientist Doctor Frankenstein would have loved these irresistible Halloween-party brownies; they’re creepy, green, decorated Mint Oreos on top of a delicious brownie. What kid (or adult) could resist this electrifying Halloween dessert? Have fun assembling your minty Oreo Frankenstein’s monsters!


  • 1 large box of brownie mix (look for one that makes a 13″ x 9″ pan)
  • Eggs, oil, and water as called for on the box
  • 1 bag Mint Oreos (the ones with the perfectly creepy green minty tint!)
  • Sharp, serrated knife
  • 2 T butter or margarine, softened
  • 1/2 cup sifted confectioners sugar
  • Dribble of milk or water



Make, bake, and cool your brownies as directed on the box. While your brownies are baking or cooling, you can do most of the following steps.

Based on the size of your pan, you will probably need to make 24 Frankenstein’s monsters. My pan is 13″ by 9″, and it was a perfect fit to make six rows of four Frankenstein monsters (requiring a total of 24 Mint Oreos). Place all 24 Oreos onto a clean working surface, preferably a cutting board.

First, take the tops off of the Oreos. You will need most of the tops, so don’t eat them just yet!


 Slice off 4 bits of the green Mint Oreo icing to reveal monster ears! Do this 24 times.


You could do the remaining decorations (for hair, eyebrows, eyes, and mouth) with tinted icing. If that’s what you want to do, use the really easy icing recipe below. For a fun, 3-dimensional effect, try making the monsters’ hair, eyebrows, and eyes by using pieces of the dark Oreo cookies. Directions are as follows.

Using a sharp SERRATED knife, slice the Oreo cookie into a small rectangle. A serrated knife gives a good sawing action with clean, sharp cuts. With 4 small cuts, voila! You have Frankenstein’s monster hair! You’ll be cutting hair 24 times, so get used to eyeballing the size you like.


Match the hair to the top of the head and press it in. You’ll need to do this 24 times, too.


Cut 24 more rectangles from the Oreos, but make them smaller and much narrower than the hair rectangles. These smaller rectangles will serve as monster eyebrows that indicate how angry he is (or perhaps how misunderstood he is)…ROWR! Press the eyebrows into the green icing. 24 times, of course.


 Make 48 eyeballs by taking small-ish Oreo crumbs and rolling them between your fingertips.

Then insert matching pairs of eyeballs onto each monster.


Now it’s time to make your Frankenstein’s monster mouth, using a simple icing recipe. Start by smooshing 2 tablespoons of butter or margarine against the side of a bowl until it is smooth.


Sift 1/2 cup of confectioners sugar into the bowl.


Add a small splash of milk or water.


Mix until it is a thick, smooth consistency.

If it’s too thin, add sugar. If too thick, add more liquid.


Spoon the icing into a plastic baggie.


Using scissors, snip off a tiny corner of the baggie.


Use the baggie as a pastry bag to make angry monster mouths on each cookie.


Ridiculously cute!


When you’re done piping all 24 mouths, snip off a bit more of the baggie and use the larger hole to make 24 icing dots on your cooled brownies. These dots will hold your monsters in place, even during transport and cutting.


Your Frankenstein’s Monster Brownies are now ready to scare and delight your Halloween guests with their intimidating mint-and-chocolate stares!



If you like this recipe, you may like these recipes:

Minty Moonlight Graveyard Brownie

Pumpkin Cheesecake Brownie

As if the pumpkin and cheesecake swirls aren't enough to make you shiver in your shoes, the sweet and spicy glaze will make you cringe with delight.