
These Frankenstein Halloween Rice Krispie Treats bring a playful and festive twist to a childhood favorite. Perfect for a spooky party or just a fun treat to enjoy with family, these colorful and crunchy delights combine the classic marshmallow sweetness with a creative monster design that captures the Halloween spirit.
The first time I made these, my nieces were fascinated by the goofy faces and loved helping me decorate each one with careful precision. Now they ask to make them every October as part of our holiday traditions.
Ingredients
- 6 cups rice krispie cereal: provides the perfect crispy base for the treats
- One 10-ounce bag mini marshmallows: gives the classic gooey texture
- Four tablespoons unsalted butter: helps melt the marshmallows smoothly and adds richness
- Ten ounces green candy melts: the bright green color brings Frankenstein’s monster to life choose high-quality melts for smooth coating
- Three ounces black candy melts: used for decorating details like stitches
- Royal icing eyes: ready-made eyes add an instant spooky charm
- Black jimmies sprinkles: create texture and mimic the monster’s hair or scars make sure they are fresh and free-flowing
Instructions
- Sauté the Aromatics:
- Cook the butter in a large pot over low to medium heat until completely melted but not browned. This sets the stage for your marshmallows.
- Melt the Marshmallows:
- Add the mini marshmallows to the pot, stirring consistently until the mixture turns smooth and glossy without burning. This step is crucial for binding your cereal.
- Combine with Cereal:
- Pour the rice krispie cereal into the pot and stir vigorously to coat every piece evenly with the marshmallow mixture. This ensures the treats hold together well.
- Press into Dish:
- Transfer the coated cereal to a buttered 9-inch by 13-inch dish and press firmly with a spatula to flatten the surface and compact the treats. This helps them set into a sturdy shape.
- Cool and Cut:
- Let the dish sit undisturbed for at least 30 minutes to firm up. Then remove and slice into rectangles of various sizes to mimic Frankenstein’s face shapes.
- Melt Green Candy:
- Using a double boiler setup place a bowl over gently boiling water and add the green candy melts. Stir often until fully melted and smooth. Thin with a teaspoon of vegetable shortening if needed for dipping.
- Dip and Decorate:
- Dip the top of each treat into the melted green candy melts then immediately into black jimmies sprinkles for texture. Apply two royal icing eyes to each while the coating is still tacky.
- Melt Black Candy:
- Melt the black candy melts in short bursts in the microwave using 10 to 15 second increments stirring in between until smooth.
- Pipe Stitches:
- Fill a piping bag with melted black candy and carefully pipe stitch marks onto each treat for the monster’s signature look.
- Set:
- Allow the decorated treats to set completely before handling or packaging, about 30 minutes at room temperature.

These treats bring me back to my childhood Halloween memories. The green candy melts are my favorite part because they make it so easy to transform simple rice krispie bars into whimsical monsters. Decorating them with kids became a joyful ritual in our family, filled with laughter and creativity.
Storage tips
Keep these treats in an airtight container at room temperature up to three days to maintain their crisp texture. For longer storage wrap tightly in plastic wrap and freeze for up to two months. Thaw at room temperature before decorating.
Ingredient substitutions
If you do not have black candy melts royal icing eyes or black jimmies you can use black decorating gel or edible markers for features. White chocolate with green food coloring can replace green candy melts but may change texture slightly.
Serving suggestions
Serve with warm apple cider or hot chocolate for a perfect Halloween movie night. They also pair well with pumpkin spice cookies or candy corn for a themed dessert table.

When piping stitches practice on parchment paper first to avoid mistakes. Using a double boiler prevents burning your candy melts and ensures smooth coating.
FAQs about Recipes
- → What cereal is best for the base?
Rice Krispie cereal works best due to its crisp texture and ability to hold marshmallow coating well.
- → How do I melt the candy melts without burning?
Melt candy melts gently using a double boiler or microwave in short increments, stirring frequently.
- → Can I use different colors of candy melts?
Yes, various candy melt colors can be used to customize the treats for different themes or preferences.
- → How should the treats be stored to stay fresh?
Store in an airtight container at room temperature to keep the treats crisp and maintain their decoration.
- → What is the purpose of the royal icing eyes?
The royal icing eyes add detailed decoration that brings the Frankenstein design to life.