Marshmallow Brains
Everybody loves a Rice Krispies treat, and these Rice Krispies Marshmallow Brains are the ultimate no-bake Halloween snack. A mix of gross and fun, they’re easy to make and perfect for Halloween parties, kids’ treats, or wrapping up for trick-or-treaters.
Prep Time: 30 minutes
Setting Time: 4 hours
Total Time: 4 hours 30 minutes
Servings: 15 brains
Ingredients
4 tbsp butter
2 cups pink and white marshmallows
¼ tsp salt
4 cups Rice Krispies (or any crispy rice cereal)
1 tube red writing icing (optional, for decoration)
Step-by-Step Instructions
- Line a large tray with non-stick paper.
- Place a pan on the stove and half fill with boiling water. Put butter and marshmallows in a heatproof bowl and set it over the water, making sure the bowl doesn’t touch the water.
- Stir occasionally until the butter has melted and the marshmallows are smooth and fully combined. Add salt and stir.
- Turn off the heat. Add Rice Krispies and gently stir until all the cereal is evenly coated.
- Lightly oil two tablespoons, scoop out a mound of mixture, and shape it into an oval brain shape on the prepared tray. Flatten slightly with oiled fingers.
- To create the indent, lightly oil a table knife and press it through the center of the mound, forming two hemispheres. Adjust shape with fingers if needed.
- Continue shaping until all mixture is used.
- Drizzle or dot with red writing icing to add a gory brain effect.
- Allow to set for 4–5 hours before serving.
Pro Tips
Use a mix of pink and white marshmallows for the best color.
Keep a small dish of oil nearby to prevent the mixture from sticking to your fingers and tools.
Make the brains while the mixture is still warm — it’s much easier to shape.
Nutrition Info
| Serving Size | Calories | Protein | Carbs | Fat | Fiber | Sugar |
|---|---|---|---|---|---|---|
| 1 brain | 87 | 1g | 14g | 3g | 0g | 6g |
Disclaimer: Nutrition facts are estimated using online tools and may vary based on your ingredients and preparation. Please consult a nutritionist for precise dietary advice.

Marshmallow Brains
- Total Time: 270 minutes
- Yield: 15 brains
- Diet: Vegetarian
Description
These Rice Krispies Marshmallow Brains are the ultimate no-bake Halloween snack, fun and easy to make for parties or trick-or-treaters.
Ingredients
- 4 tbsp butter
- 2 cups pink and white marshmallows
- ¼ tsp salt
- 4 cups Rice Krispies (or any crispy rice cereal)
- 1 tube red writing icing (optional, for decoration)
Instructions
- Line a large tray with non-stick paper.
- Place a pan on the stove and half fill with boiling water. Put butter and marshmallows in a heatproof bowl and set it over the water, ensuring the bowl doesn’t touch the water.
- Stir occasionally until the butter has melted and the marshmallows are smooth and fully combined. Add salt and stir.
- Turn off the heat. Add Rice Krispies and gently stir until all the cereal is evenly coated.
- Lightly oil two tablespoons, scoop out a mound of mixture, and shape it into an oval brain on the prepared tray. Flatten slightly with oiled fingers.
- To create the indent, lightly oil a table knife and press it through the center of the mound, forming two hemispheres. Adjust shape with fingers if needed.
- Continue shaping until all mixture is used.
- Drizzle or dot with red writing icing for decoration.
- Allow to set for 4–5 hours before serving.
Notes
Use a mix of pink and white marshmallows for vibrant color. Keep oil nearby to prevent sticking while shaping.
- Prep Time: 30 minutes
- Cook Time: 0 minutes
- Category: Dessert
- Method: No-Cook
- Cuisine: American