Get ready to serve up some serious scares with one of the most delightfully gruesome Gross Halloween Treats you can make! These Rice Krispie Brains are a spectacularly spooky and fun twist on classic Halloween Rice Krispie Treats. This is one of the best No Bake Halloween Treats, featuring a simple, marshmallowy cereal base that is tinted a ghoulish pinkish-gray and cleverly shaped into brains. Drizzled with “blood,” these Bloody Brains Halloween treats are a guaranteed showstopper for any party.

Why This is One of the Best Fun Halloween Food Ideas
When it comes to Easy Halloween Treats For Kids, this recipe is a clear winner.
- Fantastically Creepy: The brain shape is shockingly realistic (in a fun way!) and perfect for a spooky-themed celebration.
- Super Easy & No-Bake: If you can make a classic cereal treat, you can make these! There’s no oven required, making it a quick and simple project.
- Kid-Friendly Fun: Kids will have an absolute blast helping to mix, shape, and decorate these ghoulish brains.
- Deliciously Classic Taste: Underneath the spooky exterior, it’s the sweet, marshmallowy, and crunchy Halloween Cereal Treats that everyone knows and loves.
Your Simple Ingredient Checklist
You only need a few simple ingredients to create this gory and delicious masterpiece.
The Ingredient Lineup:
- 6 tablespoons of unsalted butter
- 1 (10-ounce) bag of mini marshmallows
- 6 cups of Rice Krispies cereal (or Rice Bubbles)
- ½ teaspoon salt
- Red and green food coloring
- Strawberry or raspberry dessert sauce (for the “blood” drizzle)
Step-by-Step Instructions
Get ready to create the most delightfully disgusting (and delicious) treats ever!
Part 1: Make the Brain Matter
- Melt Butter and Marshmallows: In a large pot or Dutch oven, melt the butter over low heat. Add the mini marshmallows and stir continuously until they are completely melted and smooth.
- Create the Ghoulish Color: Remove the pot from the heat. Add the salt. To get a pinkish-gray brain color, add just one single drop of red food coloring and one single drop of green food coloring to the melted marshmallow mixture. Stir vigorously until you have a uniform, creepy color.
- Mix the Cereal: Pour in the Rice Krispies cereal. Gently fold and stir with a greased spatula until all the cereal is evenly coated in the colored marshmallow mixture.
Part 2: Shape and Decorate the Brains
- Let it Cool Slightly: Let the mixture cool in the pot for a couple of minutes. It will be easier and safer to handle when it’s not piping hot.
- Shape the Brains: Grease your hands well with butter or non-stick spray. Scoop up a handful of the mixture and gently shape it into an oval, about the size of your palm.
- Create the Crease: Use the handle of a greased butter knife or your finger to press a shallow indentation down the center of the oval, creating the two halves of the brain. Place the shaped brain on a piece of wax or parchment paper. Repeat with the remaining mixture.
- Add the “Blood”: Once all your brains are shaped, take your red dessert sauce and drizzle it over the tops, letting it drip down the sides for a gory, “bloody” effect.
- Let them Set: Allow the Rice Krispie Brains to cool and firm up completely at room temperature for about an hour before serving.
Frequently Asked Questions (FAQ)
1. How do I keep the marshmallow mixture from sticking to my hands? The key is to grease your hands well! You can use a little bit of butter, shortening, or non-stick cooking spray on your palms and fingers. This will create a barrier and allow you to shape the warm, sticky mixture without any trouble.
2. Can I make these Halloween Rice Krispie Treats ahead of time? Yes, these are perfect for making ahead! You can make them a day or two before your party. Store them in a single layer in an airtight container at room temperature. For the best effect, wait to add the “bloody” drizzle until the day you plan to serve them.
3. What’s the best way to get the pinkish-gray brain color? The trick is to use a very small amount of complementary colors. Mixing a tiny drop of red and a tiny drop of green into the white marshmallow base will neutralize each other and create a perfect, spooky, grayish-pink color. Always start with less food coloring—you can always add more, but you can’t take it away.
4. What are some other Easy Halloween Treats For Kids? If you’re looking for other fun and easy ideas, you could make “Witch Hat” cookies using a chocolate cookie, a Hershey’s Kiss, and a line of orange frosting. Another great option is “Mummy” brownies, made by drizzling white icing over brownies and adding candy eyeballs.

Spooky Halloween Rice Krispie Treat Brains
Equipment
- Large pot For melting butter and marshmallows
- Greased spatula For mixing cereal
- Wax or parchment paper For cooling brains
Ingredients
- 6 tbsp unsalted butter
- 1 10-ounce bag mini marshmallows
- 6 cups Rice Krispies cereal
- 1/2 tsp salt
- 1 drop each red and green food coloring
- Strawberry or raspberry dessert sauce, for “blood” drizzle
Instructions
- Melt butter in a large pot over low heat. Add marshmallows and stir until smooth.
- Remove from heat. Stir in salt. Add 1 drop red food coloring and 1 drop green food coloring to create a pinkish-gray brain color.
- Stir in Rice Krispies cereal until evenly coated.
- Let mixture cool for 2–3 minutes. Grease hands, then shape mixture into palm-sized ovals. Use a greased knife handle or finger to press a crease down the center.
- Place on wax or parchment paper. Drizzle with strawberry or raspberry sauce to look like blood.
- Allow to cool and firm for 1 hour before serving.