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Home » Recipes » Halloween

Frankenstein Rice Krispie Treats

Modified: Nov 4, '24 · Published: Aug 31, '20 · By: Meaghan Mountford · Commission earned on paid or sponsored links.

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

 Frankenstein Rice Krispie Treats

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!

 Frankenstein Rice Krispie Treats

video how-tos

instructions

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

 Frankenstein Rice Krispie Treats

ingredients and supplies you'll need

  • baking tray
  • parchment paper
  • cooking spray
  • 4 ⅔ cups Rice Krispies
  • 10 ounces marshmallows (about 40 regular size OR 6 cups mini)
  • 4 tablespoons European salted butter
  • 2 ¼ 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.

Kellogg's Rice Krispies Col...Shop on AmazonJet-Puffed Marshmallows, 1 ...Shop on AmazonKerrygold Pure Irish Butter...Shop on Amazon
Reynolds Wrap Non-Stick Alu...Shop on AmazonFox Run, 1 x 2.75 x 2.75 in...Shop on AmazonAmericolor Gel Paste Food C...Shop on AmazonAmeriColor, Super Black, .7...Shop on Amazon
Wilton Edible Candy Eyeball...Shop on AmazonWilton 12-Inch Disposable C...Shop on AmazonWilton Decorating Piping Ti...Shop on AmazonWilton Cookie Icing, Fast-D...Shop on Amazon
OXO Good Grips Non-Stick Pr...Shop on AmazonReynolds Kitchens Unbleache...Shop on Amazon

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.

marshmallows and butter in bowl for Frankenstein Rice Krispie Treats

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

green marshmallow mixture for Frankenstein Rice Krispie Treats

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 ½-inches thick and 10 inches wide by 12 inches long.

Frankenstein Rice Krispie Treats on baking tray

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.

cutting Frankenstein Rice Krispie Treats

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.

decorating Frankenstein Rice Krispie Treats

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.

 Frankenstein Rice Krispie Treats

printable Halloween Rice Krispie treats recipe

Frankenstein Rice Krispie Treats

Frankenstein Rice Krispie Treats

Meaghan Mountford
Fun and easy Frankenstein Rice Krispie Treats for Halloween
5 from 2 votes
Print Recipe Pin Recipe
Prep Time 30 minutes mins
Cook Time 2 minutes mins
let set for 2 hours hrs
Total Time 2 hours hrs 32 minutes mins
Course Dessert
Cuisine American
Servings 16 treats
Calories 115 kcal

Equipment

  • baking tray
  • parchment paper
  • cooking spray
  • square cookie cutter (2 to 2 ½-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 ⅔ 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 ½-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. 

Notes

TIP: In place of the royal icing, decorating bag, and tip, you may purchase a black cookie icing with built-in tips. 
TO MAKE ON THE STOVE TOP:
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. 
Keyword Frankenstein Rice Krispie Treats

 Frankenstein Rice Krispie Treats

more fun Halloween treats

We love Halloween food! Find tons of Halloween food ideas on Beth's site and tons of Halloween food ideas on Meaghan's site. Here is a roundup of 15 Halloween Rice Krispie treats. 

Frankenstein fun food

  • Frankenstein chocolate bark
  • Frankenstein marshmallows 
  • Frankenstein candy cups 
  • Frankenstein pretzels 

more Rice Krispie treats

emoji rice krispie treat recipe image

emoji treats 

Rice Crispy Treat Unicorns on rainbow paper straws on a blue background

unicorn cereal treats 

five chocolate dipped rice krispie treat lollipops with 6 chocolate dipped cereal bars, and 4 chocolate dipped rice krispie treat poppers

chocolate-dipped cereal treats 

More Halloween

  • Rice Krispie Treat Skulls plain and decorated sugar skulls.
    Rice Krispie Treat Skulls
  • one eyed one horn flying purple people eater Rice Krispie Treats
    purple Halloween Rice Krispie Treats
  • orange Rice Krispie Treats for fall
    orange Rice Krispie Treats
  • black Rice Krispie Treats
    black Rice Krispie Treats

Comments

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    Recipe Rating




  1. P. Tapin says

    September 13, 2020 at 4:01 pm

    OMG, these are so cute! My daughter and I will make these for Halloween. Thanks for the cute and easy decorating idea.

    Reply
  2. Francine Helton says

    June 10, 2021 at 4:00 pm

    5 stars
    These are so cute and super easy to make. I'm pinning so I can make these for Halloween.

    Reply
  3. Monica says

    October 29, 2023 at 1:54 pm

    5 stars
    FUN! Making these for a work party. I'll use my own recipe but follow the rest for the Frankenstein look. You have the best ideas for Halloween; I've been poking through your website for the last hour and am blown away by the creativity and easy to follow directions for novices like me. Thank you!

    Reply
    • Meaghan Mountford says

      October 29, 2023 at 7:01 pm

      Thank you so much Monica! That's wonderful to hear!!

      Reply
Beth and Meaghan from How To Make Cereal Treats

Meet Beth and Meaghan. We are recipe developers, food photographers, and cookbook authors who love sharing creative cereal treat recipes with you.
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Buy our cookbook

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Beth and Meaghan from How To Make Cereal Treats

Meet Beth and Meaghan. We are recipe developers, food photographers, and cookbook authors who love sharing creative cereal treat recipes with you.
Read more about us →

popular recipes

  • BEST Rice Krispie Treats Recipe You'll Ever Try!
  • marshmallow fluff rice kripsie treats with marshmallow cream showing inside the treats
    marshmallow fluff rice krispie treats
  • Fruity Pebbles Rice Crispy Treats
  • chocolate Rice Krispie Treats
    chocolate Rice Krispie Treats

Upcoming Holiday Recipes

  • New Year's Eve Rice Krispie Treats
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  • football Rice Krispie Treats on green napkin
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  • pink and red Rice Krispie Treat hearts for Valentine's day
    heart Rice Krispie Treats
  • shamrock Rice Krispie Treats for St. Patrick's Day
    shamrock Rice Krispie Treats

How To Make Rice Krispie Treats

  • collage of Rice KrispieTreats
    How to make Rice Krispie Treats FAQ
  • Bags of assorted Rice Krispie Treats and cereal treats stacked on a freezer shelf.
    How to Freeze Rice Krispie Treats
  • Marshmallows drawing with cute smiley faces.
    Marshmallows
  • cut Rice Krispie Treats using cookie cutters to make shapes
    Rice Krispie Treat shapes

Buy our cookbook

How To Make Cereal Treats cookbook image

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