Trust me, decorating them is half the fun! I find myself getting creative with the icing and candy eyes. They’re a hit at every spooky gathering, and they disappear in no time! 🎃
Key Ingredients & Substitutions
Brownie Mix: Use any brownie mix you like, or go homemade for a richer flavor. If you want a gluten-free option, try gluten-free brownie mixes that are widely available.
Frosting: I recommend chocolate frosting for its rich flavor. You can use store-bought or whip up your own if you prefer. For the green frosting, using a basic white frosting and adding food coloring gives that perfect Frankenstein shade!
Candy Eyeballs: If you can’t find candy eyeballs, just use chocolate chips or mini marshmallows with a dot of black icing for pupils. They work just as well!
Black Decorating Gel: If you don’t have black gel, dark chocolate icing or melted dark chocolate can also create that spooky hair effect. It’s a great backup!
How Do I Get the Best Decoration on My Brownies?
Decorating your brownies can be the best part! Start with a smooth base of chocolate and green frosting, then get creative. Here are a few tips to make them look amazing:
- Use a piping bag for cleaner designs when adding the black gel or icing.
- Try chilling the frosted brownies for about 30 minutes before cutting to help the frosting set; this makes them easier to decorate with precision.
- Get kids involved! Let them create their own Frankenstein faces with toppings for a fun activity.
Remember, worry less about making them perfect; the fun is in the Halloween spirit and creativity! Enjoy making these spooky treats!

How to Make Frankenstein Brownies
Ingredients You’ll Need:
- 1 batch of your favorite brownie mix or homemade brownie batter (enough for a 9×13-inch pan)
- 1 cup chocolate frosting (store-bought or homemade)
- Green food coloring
- 1 cup white frosting (for mixing with green coloring)
- Black decorating gel or black icing
- Candy eyeballs (about 12)
- Black sugar or edible glitter (optional, for hair shine)
- Candy corn (optional, for decoration)
How Much Time Will You Need?
This delightful treat will take about 40 minutes of active preparation time plus baking, which usually takes about 25-30 minutes. Allow time for cooling and decorating, bringing your total time to around 1 hour and 15 minutes. Don’t forget to let the brownies cool completely before you dive into the fun decorating!
Step-by-Step Instructions:
1. Bake the Brownies:
Start by preheating your oven according to the brownie mix instructions. Prepare the brownie batter as directed and pour it into a greased 9×13-inch baking pan. Bake until a toothpick inserted in the center comes out mostly clean, which should take around 25-30 minutes. Once baked, remove them from the oven and let them cool completely in the pan.
2. Prepare the Frosting:
While the brownies are cooling, it’s time to prepare the frosting. In a bowl, take the white frosting and mix in a few drops of green food coloring. Keep adding food coloring until you achieve a vibrant Frankenstein-green shade. Set this aside along with your chocolate frosting, which will be the base layer.
3. Frost the Brownies:
Once your brownies are fully cooled, spread a thick layer of chocolate frosting evenly over the top. Follow this by gently spreading the green frosting over the chocolate layer to form Frankenstein’s face.
4. Decorate the Hair:
Grab the black decorating gel or icing and pipe zigzag shapes along one edge of each brownie square to create Frankenstein’s hair. If you’d like, sprinkle some black sugar or edible glitter over the hair area for added texture and shine!
5. Add the Face Details:
Now for the fun part! Place two candy eyeballs on each brownie to give them their spooky faces. Use the black decorating gel to draw a stitched mouth at the bottom of each face, adding personality to your monster treats.
6. Cut and Serve:
Using a sharp knife, cut the brownies into squares, making sure each piece showcases the fun face design. For a final touch, you can place candy corn pieces around the brownies for some extra festive flair. Now serve and enjoy these spooky Frankenstein brownies with friends and family!
Perfect for Halloween parties or themed events, these brownies are sure to delight both kids and adults alike with their fun appearance and rich, chocolatey flavor!

Can I Use Different Types of Brownie Mix?
Absolutely! You can use any brownie mix you prefer, including gluten-free options. If you want a made-from-scratch version, feel free to adapt your favorite homemade brownie recipe!
How Should I Store Leftover Brownies?
Store any leftover brownies in an airtight container at room temperature for up to 3 days. If you want to keep them longer, you can refrigerate them for up to a week or freeze them for up to 3 months. Just make sure to wrap them well to prevent freezer burn!
Can I Make These Brownies Ahead of Time?
Yes, you can prepare the brownies a day in advance! Simply bake and cool them, then frost them the next day. This way, they stay fresh for your Halloween party.
What If I Don’t Have Black Gel Icing?
No problem! You can substitute black gel with dark chocolate icing or melted chocolate. Just pipe it on or drizzle it, and it will achieve a similar spooky effect!


