These spooky Frankenstein Rice Krispie Treats are a fun and tasty twist on the classic snack! Made with gooey marshmallows and crispy rice cereal, they’re perfect for Halloween.
You can’t help but smile at these cute little monsters! I love making them with my kids; it’s a great way to make some messy memories in the kitchen. They just can’t resist gobbling them up! 🎃
Key Ingredients & Substitutions
Rice Krispies cereal: This is the backbone of the treats. While Rice Krispies work best, you can use any puffed rice cereal or a gluten-free version if needed.
Mini marshmallows: Essential for that gooey texture! If you’re looking for a vegan option, try using vegan marshmallows, which melt beautifully.
Green food coloring: This gives our Frankenstein treats their vibrant color. You could also use natural food colorings or omit it if you prefer a more rustic look!
White chocolate chips: Perfect for the eyes! If you want a dairy-free version, go for dairy-free chocolate chips or melts.
Black licorice: This adds a fun touch for the mouth. If you’re not a fan, consider using chocolate sprinkles or even a slice of an olive as a unique substitute!
How Do I Melt Marshmallows for the Perfect Treats?
Melted marshmallows are crucial for making your Rice Krispie treats soft and chewy. Follow these simple steps:
- Use low heat to avoid burning. Stir frequently until completely melted.
- Feel free to add the butter first, as it helps prevent sticking.
- Be patient! Don’t rush the melting—keeping it at a low temperature ensures a smooth mixture.
Remember, stirring the marshmallows while they’re melting helps achieve a consistent gooey texture. As a tip, I like to keep my spatula greased to make mixing easier!

Frankenstein Rice Krispie Treats
Ingredients You’ll Need:
For the Treats:
- 6 cups Rice Krispies cereal
- 4 cups mini marshmallows
- 3 tbsp unsalted butter
- Green food coloring
For Decoration:
- 1 cup white chocolate chips or white candy melts
- Black decorating gel or melted dark chocolate
- Candy eyes
- Black licorice string, cut into small pieces (for mouths)
- Brown or dark chocolate for hair decoration
How Much Time Will You Need?
This recipe takes about 15 minutes to prepare and around 30 minutes to set. Overall, you’re looking at just under an hour from start to finish before these spooky treats are ready to enjoy!
Step-by-Step Instructions:
1. Melting the Marshmallows:
Start by melting the butter in a large pot over low heat. Add the mini marshmallows and stir constantly until they completely melt and become smooth.
2. Adding Color:
Once melted, remove the pot from heat and add green food coloring. Start with just a few drops and mix until you get that bright Frankenstein green you desire. It should be fun and vibrant!
3. Mixing in the Cereal:
Now, it’s time to add the Rice Krispies cereal! Quickly fold it into the melted marshmallow mixture, stirring thoroughly until every piece is coated in the green gooeyness!
4. Forming Frankenstein’s Head:
Grease a 9×13-inch baking dish with butter or non-stick spray. Take half of the green mixture and press it into the bottom of the dish to form the top part of Frankenstein’s head. Use a spatula to ensure an even surface.
5. Making the Face:
For the lower half of the face, take the remaining mixture (without green color) and press it evenly into the bottom of the dish, creating the mouth area. If you want distinct green and non-green layers, just be sure to follow your coloring plan!
6. Cutting the Treats:
Once everything has set (give it about 30 minutes at room temperature or pop it in the fridge), take a sharp knife and cut the treats into rectangle shapes, resembling Frankenstein’s face.
7. Decorating the Face:
Melt the white chocolate or candy melts in a microwave-safe bowl. Carefully pipe or spread it onto the cut rectangles to form the eyes. While the chocolate is still wet, place the candy eyes on top to make them pop!
8. Creating the Mouth:
Using the black licorice pieces, create a fun monster mouth! You can attach them with a bit of melted chocolate or decorating gel for extra sticking power.
9. Adding Hair and Details:
Finally, melt some dark or brown chocolate to pipe along the top edge of each rectangle for Frankenstein’s wild hair. Don’t forget to add some bolts or scars with the decorating gel for that wicked detail!
10. Letting Them Set:
Allow all the decorations to set properly before serving. These cute little monsters will be ready to delight your friends and family! Enjoy with a cold glass of milk or your favorite drink.
These Frankenstein Rice Krispie Treats are a fun and spooky way to celebrate Halloween! They’re sure to be a hit at any party. Enjoy the deliciousness!

Can I Use Vegan Marshmallows?
Absolutely! For a vegan option, substitute regular mini marshmallows with vegan marshmallows, which melt beautifully and work just as well for these treats.
What Can I Use Instead of Black Licorice?
If black licorice isn’t your favorite or you can’t find it, try using chocolate sprinkles, gummy candy, or even a slice of an olive for a fun mouth shape!
How Should I Store Leftover Treats?
Store any leftover Rice Krispie treats in an airtight container at room temperature for up to 3 days. If they get a bit hard, just warm them briefly in the microwave to soften!
Can I Make These Treats Ahead of Time?
Yes! You can prepare them a day in advance. Just store them in an airtight container to keep them fresh, and they’ll be ready for your event!


