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Home ยป Desserts

Easy Halloween Brain Jello Mold Recipe

Published: Oct 16, 2024 ยท Modified: Apr 5, 2025 by Joanie Simon ยท This post may contain affiliate links ยท Leave a Comment

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This Halloween Brain Jello mold recipe is a sweet and spooky treat that's easy to make. All you need are two ingredients (aside from water) and a silicone mold for this jiggly conversation piece.

A green jello brain on a grey platter with fake spiders and a spider web tablecloth.

Blame this recipe on Amazon. For some reason they knew I would be lured in by seeing a silicone brain Jell-O mold.

Testing this Recipe

I tested a number of different variations on this recipe including mixing in crushed pineapple, maraschino cherries and gummy worms. Ultimately, the family's favorite was a simple combination of lime green jello and cool whip. Keep it simple!

Lime green Jell-O seemed the right choice for this recipe because it's less realistic than the pink color of Strawberry jello.  And orange and lemon also didn't make sense. Green like zombies! 

A green jello brain on a grey platter with fake spiders and a spider web tablecloth.

Cool Whip is added to make the final dessert more of a fluffy texture and makes the brain opaque, as opposed to a clear green that you'd get if it was just made of Jello.

How to Make a Halloween Brain Jell-O Mold

Time needed: 5 hours

Ready to get jiggly with it? Let's go!

  1. Prepare the Jell-O

    Add 3oz of Jell-O mix to 1 cup of boiling water and stir until it's dissolved. Then add 1 cup of cold water to it and refrigerate the Jell-O for 1 hour. You want it to cool and thicken slightly, but still be pourable for the next step.
    adding cold water to the dissolved jello

  2. Combine the Jell-O and Cool Whip

    Use a whisk for this step. Put 2 cups of defrosted Cool Whip into a large bowl then pour the Jell-O in slowly and gradually, whisking continually as you add it to the whip. This will help to ensure a smooth texture, otherwise, the Cool Whip and Jello will separate and you'll end up with a kinda speckly final dessert. That will still work, but I prefer a nice, homogenous green mixture. If you want to make it an even more vibrant green color, add green food coloring.
    adding jello to the cool whip

  3. Into the Mold it Goes

    First spray the plastic mold with non-stick cooking spray so that your brain comes out clean after it's set. Then pour the gelatin mix into the mold and pop it in the fridge at least 4 hours until the Jello is set.
    the silicone brain mold filled with jello

  4. Release the Brain

    I run a knife around the edge of mold before then placing the serving plate on top of the mold, turning the whole thing upside down. At this point, the brain should release from the mold and you'll be ready to serve it to your party guests!
    green jello and cool whip solidified in a silicone mold

I can't wait to bring this to my sister's annual Halloween party. She always serves spaghetti bolognese. Do you have a Halloween tradition? I'd love to hear about it in the comments below!

A green brain shaped jello dessert with a slice taken out

More Creepy Treats for Halloween Parties

  • Black Velvet Cupcakes
  • Spiderweb Chocolate Bark
  • Frankenstein Rice Krispie Treats
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A green jello brain on a grey platter with fake spiders and a spider web tablecloth.

Easy Halloween Brain Jello Mold Recipe

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  • Author: Joanie Simon
  • Prep Time: 6 hours
  • Total Time: 6 hours
  • Yield: 8 servings
  • Category: dessert
  • Method: refrigerator
  • Cuisine: American
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Description

You only need two ingredients (aside from water) for this Halloween Brain Jello mold. It's a sweet and spooky jiggly conversation piece.


Ingredients

  • 1 cup boiling water
  • 3 oz green Jello
  • 1 cup cold water
  • 2 cups (5oz) frozen whipped topping
  • nonstick cooking spray


Instructions

  • Add 3oz of Jell-O mix to 1 cup of boiling water and stir until it's dissolved.
  • Then add 1 cup of cold water to the jello mixture and refrigerate for 1 hour. You want it to cool and thicken slightly, but still be pourable for the next step.
  • Add 2 cups of defrosted Cool Whip into a large bowl then pour the chilled Jell-O in slowly and gradually, whisking continually as you add it to the whip. This will help to ensure a smooth texture, otherwise, the Cool Whip and Jello will separate and you'll end up with a kinda speckled final dessert.
  • Spray the silicone brain mold with non-stick cooking spray so that your brain comes out clean after it's set.
  • Then pour the gelatin mix into the mold and pop it in the fridge at least 4 hours until the Jello is set.
  • Once the Jello is set, run a knife around the edge of mold before then placing a serving plate on top of the mold, turning the whole thing upside down. The brain should release and be ready to serve.
  • If you're not ready to serve it right away, cover the brain in plastic wrap and keep chilled in the refrigerator up to two days.

Nutrition

  • Serving Size:
  • Calories: 45
  • Sugar: 4.8 g
  • Sodium: 15.1 mg
  • Fat: 2.5 g
  • Carbohydrates: 5 g
  • Fiber: 0.2 g
  • Protein: 0.7 g
  • Cholesterol: 0.4 mg

Did you make this recipe?

Tag me @joanieraysimon on Instagram. I'd love to see!

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photo of Joanie Simon, author of thedinnerbell.recipes

Hi, I'm Joanie

Sharing everyday eats, from blood sugar-friendly meals to special occasion favorites. Ring The Dinner Bell with food that makes you feel good!

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