Halloween is all about bringing spooky characters to life in the kitchen. Frankenstein Brownies are a fun, festive treat that combines fudgy brownies with creative decorations to resemble everyone’s favorite green monster. They’re easy to make, kid-friendly, and guaranteed to be a hit at Halloween parties, bake sales, or family movie nights.

Frankenstein Brownies
Equipment
- rectangular baking pan (8×8 or 9×13)
- Mixing bowl
- spatula or offset spatula
- knife
- piping bag (for icing)
- Serving platter
Ingredients
- 1 batch brownies (homemade or boxed mix), baked and cooled
- 1 cup green frosting, tinted with gel food coloring
- 24 candy eyeballs
- 1/4 cup black icing or melted chocolate
- 12 pretzel sticks or candy pieces (for bolts)
- optional decorations (sprinkles, edible glitter, or marshmallows)
Instructions
- Prepare brownies in a rectangular pan (8×8 or 9×13 depending on thickness). Allow to cool completely before decorating.
- Slice brownies into rectangles for Frankenstein’s face. Trim edges if needed for uniform shapes.
- Spread green frosting over the top of each brownie to create the monster’s face.
- Place candy eyes near the top, pipe black frosting for hair, mouth, and stitches, and insert pretzel sticks for Frankenstein’s bolts.
- Arrange brownies on a platter and serve as a creepy-cute centerpiece for your Halloween dessert table.
Notes
What Are Frankenstein Brownies?
Frankenstein Brownies are brownies decorated with green frosting, candy eyes, and edible details to look like Frankenstein’s monster. Some versions use cut brownie rectangles as the monster’s face, while others use round or square brownies topped with colorful frosting. The decoration is simple but striking, making these treats perfect for spooky season.
Ingredients You’ll Need
- Brownies – homemade or boxed mix, baked and cooled
- Green frosting – tinted with gel food coloring
- Candy eyeballs – small or large for the monster face
- Black icing or melted chocolate – for hair, stitches, and mouth
- Pretzel sticks or candy – for Frankenstein’s “bolts”
- Optional extras – sprinkles, edible glitter, or marshmallows
Step-by-Step Instructions
Step 1 – Bake the brownies
Prepare brownies in a rectangular pan (8×8 or 9×13 depending on thickness). Allow to cool completely before decorating.
Step 2 – Cut into monster shapes
Slice brownies into rectangles for Frankenstein’s face. Trim edges if needed for uniform shapes.
Step 3 – Frost with green icing
Spread green frosting over the top of each brownie to create the monster’s face.
Step 4 – Add the details
- Place candy eyes near the top.
- Pipe black frosting or melted chocolate for spiky hair, mouth, and stitches.
- Insert pretzel sticks on either side for Frankenstein’s bolts.
Step 5 – Let set and serve
Arrange brownies on a platter and serve as a creepy-cute centerpiece for your Halloween dessert table.
Creative Variations
- Mini Frankenstein Faces: Use small square brownies for bite-sized treats.
- Marshmallow Heads: Add a green-frosted marshmallow on top of each brownie as Frankenstein’s head.
- Monster Mash Tray: Decorate each brownie differently—Frankenstein, mummies, and monsters—for variety.
- Chocolate Ganache Base: Replace frosting with a green-tinted white chocolate ganache for a smooth finish.
Tips for Success
- Let brownies cool before frosting to prevent melting.
- Use gel food coloring for bright, bold green frosting.
- Decorate just before serving if storing in the fridge to keep pretzels from softening.
- Get kids involved—let them create their own monster faces.
FAQs
Can I use store-bought brownies?
Yes, simply cut and decorate pre-made brownies if you’re short on time.
What frosting works best?
Buttercream holds its shape well and is easy to tint, but canned frosting works too.
How far in advance can I make them?
Brownies can be baked 1–2 days in advance. Decorate the same day for the freshest look.
What if I can’t find candy eyes?
Make DIY eyes with white chocolate chips and mini chocolate chips for pupils.
Why They’re Perfect for Halloween
Frankenstein Brownies are festive, fun, and approachable for all skill levels. They capture the Halloween spirit without being too scary and double as both a dessert and a decoration. Plus, they’re deliciously chocolatey underneath all the spooky décor.
Conclusion
Frankenstein Brownies are the perfect way to bring Halloween to life in the kitchen. With green frosting, candy eyes, and creative details, they’re a playful and tasty treat for kids and adults alike. Serve them at parties, give them as gifts, or enjoy them as a fun family baking project.