Back in 2013, I posted a recipe for how to make rainbow jello. After I wrote that post I vowed to never make rainbow jello again because it took so much time. It was not difficult to make but I knew there had to be a better way to make this recipe quickly (or at least, faster than the entire day it took me the first time around). So, I did some experimenting and was able to make this rainbow jello recipe in less than an hour!Rainbow Jello Recipe - you can make this colorful treat in under an hour

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How to make rainbow jello for St

Step 1: To start with you will add your purple powdered gelatin mix into a bowl.

Add gelatin powder to a glass bowl or large measuring cup

Step 2: Add 1 cup boiling water. Stir to dissolve. (Approximately 2 minutes)

Add boiling water to jello and stir until dissolved

Step 3: Add 1 cup ice cubes and stir until they are melted. (Approximately 2 minutes)

Add ice cubes to jello and stir until melted

Note: If your jello has a lot of foam on top or any remaining unmelted ice cubes, skim them off the top.

Step 4: Add 2 – 3 tablespoons of the jello mixture into clear plastic cups. I found it easiest to transfer the cups back and forth by setting all the cups on a metal tray.

Place jello cups on tray to make it easier to move

Step 5: Freeze the jello cups for 5 – 8 minutes.

While, the jello is setting up, repeat steps 1 – 3 for the next color of jello. When the first layer of jello has set up in the freezer, add your next layer of jello – repeating steps 4 and 5. Rainbow Jello Recipe - quick set method takes under an hour to makeRepeat this process until you have all six colors of jello in your cups. 

Quick set rainbow jello recipe

Place the cups in the refrigerator for 30 minutes for soft jello and 1 hour for firmer jello.

Recipe - Rainbow Jello

Since I was able to make each color while the previous layers were setting up, rather than the 30 minutes per layer the first time I made this, the whole process took under an hour. So now, we can have rainbow jello for St. Patrick’s Day or even another Tie Dye Party!

Learn how to make rainbow jello in under 1 hour

Rainbow Jello

A fun and festive treat to make for a rainbow party or St. Patrick's Day!

Course Dessert
Prep Time 1 hour 40 minutes
Total Time 1 hour 40 minutes
Servings 12
Author Laura Silva


  • 6 packages 3 ounce jello (red, orange, yellow, green, blue, purple)
  • 6 cups boiling water
  • 6 cups ice cubes
  • Clear plastic cups
  • Whip cream optional


For each layer of jello:

  1. Dissolve one packet of jello in 1 cup boiling water. Stir to dissolve (approximately 2 minutes).
  2. Add one cup ice cubes and stir until they are melted (approximately 2 minutes).
  3. Add 2 - 3 tablespoons of the jello mixture to each cup.
  4. Freeze for 5 - 8 minutes or until set.
  5. Repeat the above steps, layering each color of jello until you have all six layers completed.
  6. Place cups in the refrigerator for 30 minutes to 1 hour until completely set.

Recipe Notes

Optional: Top with whip cream.

Laura Silva

4 Comments on Rainbow Jello Recipe

  1. I am trying this for a party! Do you remember how many cups of rainbow Jell-O were made from those 6 packages? I need to make 50 individual cups :)

    • Erika,
      I am so sorry, but I honestly don’t remember. I know each package of jello makes about 2 cups, so you would have a total of about 12 cups of jello. It would also depend on the size cups you use as to how many you could fill. You may want to try to make it in a couple of sheet pans instead and then cut it into squares. That may be a better way to make such a large number of servings.

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