Name: Frankenstein Rice Krispie Treats
Prep time: 30 min
Cook time: 2 min
Total time: 152 min
Ingredients: 4 2/3 cups Rice Krispies; 10 ounces marshmallows (about 40 regular OR 6 cups mini); 4 tablespoons European salted butter; 1 cup royal icing

Scary (well, cute) Frankenstein Rice Krispie Treats are a fun and easy no-bake recipe for Halloween.

Frankenstein Rice Krispie Treats

All you need is some green food coloring, candy eyes, and icing to turn cereal treats into Frankenstein Rice Krispie Treats. Mary Shelley could never have predicted her doctor’s creation would take his name and his likeness would be shared far and wide every Halloween, even into cute food.

As always, we start with the BEST Rice Krispie treat recipe ever. Need help? Our FAQ page has all the answers!

video how-tos

how to make Frankenstein cereal treats

For less sticking and to make cereal treats a breeze to make, spray cooking spray on your bowls and spatulas.

ingredients and supplies you’ll need

baking tray
parchment paper
cooking spray
4 2/3 cups Rice Krispies
10 ounces marshmallows (about 40 regular size OR 6 cups mini)
4 tablespoons European salted butter
2 1/4 inch square cookie cutter
royal icing recipe
green food coloring
black food coloring
candy eyes
disposable decorating bag
size 2 tip

TIP: Instead of the disposable decorating bag and tip, you can use a ziplock bag and snip a bit from the tip, OR, use a tube of store-bought black cookie icing.

let’s make cereal treats!

microwave method

Line your baking tray parchment paper and set aside.

Pour the Rice Krispies in a large bowl greased with cooking spray. Set aside.

Now, let’s melt the marshmallows. In a medium-large, microwave-safe bowl, place the marshmallows and butter. Head on high for 1 minute. Stir the marshmallows until they start to melt. Heat for an additional 15 seconds and let the bowl sit in the microwave for one minute. Stir the marshmallows very well until smooth, using the residual heat to fully melt the mixture.

Next, stir a few drops of green food coloring into the marshmallow mixture until desired shade is reached.

Pour the green mixture over the cereal and blend very well.

Transfer the treats to the baking tray and press evenly to form a rough rectangle 1/2-inches thick and 10 inches wide by 12 inches long.

Let set 1 to 2 hours, or chill more quickly in the refrigerator.

When ready, use the cookie cutter to cut out squares as closely together as possible. Alternatively, you can use a knife to cut squares. You should have about 16 squares.

To decorate, prepare icing according to the recipe (find a link to my favorite recipe in the ingredients list) and tint black. Assemble the decorating bag with tip and fill with the black icing. Close with a rubber band. OR, use a Ziplock bag and snip the tip. OR, use store-bought, black, cookie icing with built-in tips.

Pipe and fill the hair. Pipe two dots and attach the candy eyes. Add a mouth and scar. Let the icing dry.

stove top method

Prepare the baking tray with parchment paper and place the Rice Krispies in a greased bowl, as above.

In a large sauce pan, heat the marshmallows and butter on low heat, stirring frequently, until the marshmallows are almost melted. Remove from heat and continue to stir until the mixture is very smooth.

Add green food coloring and follow the instructions above.

printable Halloween Rice Krispie treats recipe

Frankenstein Rice Krispie Treats

Meaghan Mountford

Fun and easy Frankenstein Rice Krispie Treats for Halloween

5 from 1 vote

Print Recipe Pin Recipe

Prep Time 30 mins

Cook Time 2 mins

let set for 2 hrs

Total Time 2 hrs 32 mins

Course Dessert

Cuisine American

Servings 16 treats

Calories 115 kcal

Equipment

baking tray
parchment paper
cooking spray
square cookie cutter (2 to 2 1/2-inch)
green food coloring (Americolor Soft Gel Paste Electric Green)
black food coloring (Americolor Soft Gel Pate Super Black)
candy eyes
disposable decorating bag
size 2 tip

Ingredients

4 2/3 cups Rice Krispies
10 ounces marshmallows about 40 regular OR 6 cups mini
4 tablespoons European salted butter
1 cup royal icing

Instructions

Line your baking tray parchment paper and set aside.
Pour the Rice Krispies in a large bowl greased with cooking spray. Set aside.
In a medium-large, microwave-safe bowl, place the marshmallows and butter. Head on high for 1 minute. Stir the marshmallows until they start to melt. Heat for an additional 15 seconds and let the bowl sit in the microwave for one minute. Stir the marshmallows very well until smooth, using the residual heat to fully melt the mixture.
Stir a few drops of green food coloring into the marshmallow mixture until desired shade is reached.
Pour the green mixture over the cereal and blend very well.
Transfer the treats to the baking tray and press evenly to form a rough rectangle 1/2-inches thick and 10 inches wide by 12 inches long.
Let set 1 to 2 hours, or chill more quickly in the refrigerator.
When ready, use the cookie cutter to cut out squares as closely together as possible. Alternatively, you can use a knife to cut squares. You should have about 16 squares.
To decorate, prepare icing according to the recipe (find a link to my favorite recipe in the ingredients list) and tint black. Assemble the decorating bag with tip and fill with the black icing. Close with a rubber band. OR, use a Ziplock bag and snip the tip. OR, use store-bought, black, cookie icing with built-in tips.
Pipe and fill the hair. Pipe two dots and attach the candy eyes. Add a mouth and scar. Let the icing dry.