Frankenstein Rice Krispie Treats (No-Bake, Under $1 Each)

These Frankenstein Rice Krispie Treats are soft, green no-bake bars with chocolate-dipped hair, candy eyes, and Rolo neck bolts. You only need one pot, a 9×13 pan, and a few grocery-store candies, and the whole batch of 12 costs about $10.63, or $0.89 per treat. They take about 25 minutes of hands-on time, which makes them an easy pick for class parties and Halloween nights.

Frankenstein Rice Krispie Treats decorated and ready to enjoy.

My kids love helping decorate the faces, and every Frankenstein comes out a little different. It makes these treats fun to make together, especially when everyone gets to create their own silly face.

Why You’ll Love This Recipe!

Carrie, the owner, with long dark hair, wearing earrings and a purple top, smiles at the camera in front of a textured, beige background.

No Baking – This entire recipe comes together on the stovetop with just a pot and a 9×13 pan.
Kid-Friendly Decorating – Hair, eyes, mouths, and bolts let everyone create their own Frankenstein.
Budget-Friendly – The entire recipe costs about $10.63, or $0.89 per serving.

After years of baking homemade treats for my family, I’ve learned that simple recipes are often the most fun to make with kids. I’ve tested these treats to make sure the Rice Krispie mixture holds together and there is plenty of room to decorate each Frankenstein.

You may also like to make Monster Donuts, Halloween Marshmallows and Halloween Bark Recipe.

Ingredients

Rice Krispie Cereal. Use fresh rice cereal for the best texture. Fresh cereal gives the treats a light crunch and keeps them from tasting stale or chewy.
Butter. Real butter adds rich flavor and helps create a soft, chewy texture.
Marshmallows. I like to use mini marshmallows because they melt quickly and evenly. Make sure they are fresh for the smoothest mixture and softest treats.
Green Gel Food Coloring. Gel food coloring gives the treats a bright, vibrant green color without adding extra liquid to the marshmallow mixture. Start with a small amount and add more until you reach the shade you want.
Chocolate Chips (Frankenstein’s hair). Regular milk chocolate chips are budget-friendly and most of us already have a bag in the pantry. If the melted chocolate looks too thick to dip, stir in 1 teaspoon of vegetable oil or shortening to loosen it.
Brown Sprinkles (hair texture). Optional, but they make the hair look messy and fun.
Candy Eyes (eyes). Stuck on with a dab of melted chocolate.
Rolos (neck bolts). One on each side. Mini Reese’s cups or pretzel pieces also work.
Black Writing Gel (mouth and stitches). Draw a crooked mouth and a few forehead stitches.

Find the complete list of ingredients at the bottom of the page.

Step By Step Instructions

Step 1. Prepare the pan. Spray a 9X13 pan with a non-stick cooking spray and set aside.

Melted marshmallows and butter in a saucepan.

Step 2. Melt the marshmallows and butter. Melt the butter and marshmallows in a large pot over low heat, stirring often. Low heat keeps the marshmallows soft. High heat makes the treats hard and chewy once they cool.

Green food coloring mixed into the melted marshmallows.

Step 3. Remove the marshmallow mixture from heat. Once the ingredients melt and combine, remove from heat. Add in the drops of green food coloring until the mixture is a vibrant green coloring.

Cereal combined with green marshmallow mixture.

Step 4. Add the cereal. Gradually stir in the Rice Krispie Cereal. Mix until the cereal is coated in the marshmallow and butter mixture.

Cereal mixture pressed into pan with wax paper.

Step 5. Spread the mixture into the baking dish. Spread the mixture into the pan and press gently with a sheet of parchment sprayed with cooking spray. Don’t pack it down hard. Firm pressing makes dense, hard treats. Let the bars cool at room temperature for at least 30 minutes until they feel firm, then cut into 12 rectangles. For tall, head-shaped bars, make 1 cut down the length of the pan and 5 cuts across, which gives you 12 bars about 2¼ x 4½ inches. A knife sprayed with cooking spray cuts cleanly without dragging.

Marshmallow square dipped into chocolate.

Step 6. Melt the chocolate. Melt the chocolate chips in 30-second bursts, stirring between each. Flip each bar so the flat bottom side faces up and it’s easier to decorate. Dip the top ½ inch of each bar into the chocolate to make Frankenstein’s hair, then add brown sprinkles.

Sprinkles added to the treats and candy eyes.

Step 7. Add the sprinkles and eyes. Use a dab of melted chocolate as glue to attach 2 candy eyes and a Rolo on each side for the neck bolts. Then use the black gel to draw a mouth and a few stitches. Let set 30–60 minutes.

Expert Tips

Use a small, deep bowl for dipping. A narrow bowl keeps the melted chocolate deep enough to coat the top half inch of each bar in one dip. In a wide bowl it spreads too thin.
Add the gel mouth last. Writing gel stays soft and a little tacky, so draw the faces after the eyes and bolts are on and handle the bars by the sides.
Use fresh marshmallows. Older marshmallows melt unevenly and give you stiffer bars, even on low heat.

Storage

Store the decorated treats in a single layer in an airtight container at room temperature for up to 3 to 4 days. If you need to stack them, put a sheet of wax paper between layers so the gel and chocolate don’t stick. Don’t refrigerate them, or the bars will harden and the texture will change.

To freeze, freeze the plain cut bars (before decorating) between layers of wax paper for up to 4 months. Thaw them at room temperature, then dip and decorate.

Variations

Easy Candy Eyes. If you don’t have candy eyes, cut mini marshmallows into thin circles and press them onto the bars. Use black writing gel to add a small dot to the center of each one.
Pocky or pretzel eyebrows. Press a short piece across the top for a grumpy brow.
Give Each Frankenstein a Different Face. Have fun changing the expressions by placing the eyes in different positions or creating different mouths. Black or green candy melts can also be used for decorating.
Make Rice Krispie Treat Pops. Insert a lollipop stick into each finished treat to turn them into fun handheld pops. Wrap them individually in cellophane for an easy party favor or classroom treat.
Make Chocolate Rice Krispie Treats. Use chocolate Rice Krispies cereal instead of regular cereal and leave out the green food coloring. The chocolate cereal creates a darker Frankenstein that is especially fun for Halloween.

Frequently Asked Questions

Can I use store-bought Rice Krispie treats?

Yes. Unwrap individually wrapped treats, dip in green candy melts (instead of coloring the cereal), then decorate the same way.

How far ahead can I make these?

For the best texture, make them up to 2 days ahead. They keep 3 to 4 days, but the bars are softest in the first couple of days. For a bigger head start, freeze the plain bars and decorate after thawing.

Why are my Rice Krispie treats hard?

Usually the marshmallows were melted over heat that was too high, or the mixture was pressed too firmly into the pan. Old marshmallows can also make stiffer bars, so use a fresh bag.

Can I use regular marshmallows instead of mini?

Yes. A 10-ounce bag of regular marshmallows works the same way. They just take a few extra minutes to melt over low heat.