3.5 from 2 votes
Rainbow Jello Recipe & Instructions
Prep Time
5 hrs
Total Time
5 hrs
 
Beautiful rainbow jello that can be modified for many different occasions! Easy to make and so many different color combinations you can do!
Course: Dessert
Cuisine: Dessert
Servings: 24
Author: Sarah | Must Have Mom
Ingredients
  • 6 small packages 3 ounces of different jello colors
  • 5 packages Knox unflavored gelatin or buy a bulk can to save money
  • 2 14 ounce can sweetened condensed milk
  • Water
Instructions
  1. You will make this in a glass 9x13 pan.
  2. First layer: Mix 1 package of any flavor jello with 1 tsp Knox gelatin and 1 cup boiling water. Cool and pour into pan; refrigerate until set. Make sure your pan is on an even surface so your layer is level. It takes about 30 minutes to set up in the fridge before you can move on to the next layer. Important While waiting for your Jello to set, make the next layer and leave it to cool on the countertop.
  3. Second layer: Mix 1 envelope Knox gelatin (or 2 tsp bulk powder) with 1/2 cup hot water until dissolved. Add 1/2 can condensed milk and an additional 1/2 cup hot water. Once cooled pour 3/4 cup (just enough to cover the Jello and make a thin layer) of the milk mixture over the set jello and refrigerate until firm. It takes 30 minutes for this layer to set up in the fridge. As soon as you put the white layer in the fridge to chill make the next color jello so that it will have 30 minutes to cool on the counter.
  4. Repeat first and second layer directions ending with a color jello layer. Half way through the process you will need to make the other half of your white mixture. The first time I made this I made the white layer all in one batch and ended up with a bowl of jelled white mix before I was done because it takes so long for the layers to set. If this happens to you just immerse the bottom of your white mixture bowl in hot water until it liquifies again.
  5. Once you run out of white mixture then Mix 1 envelope Knox gelatin (or 2 tsp bulk powder) with 1/2 cup hot water until dissolved. Add the other 1/2 can condensed milk and an additional 1/2 cup hot water. Once cooled pour 3/4 cup (just enough to cover the Jello and make a thin layer) of the milk mixture over the set jello and refrigerate until firm. Continue repeating layers until you are done. Recipe note: Some readers ran out of white mixture. If you make your white layers too thick you will run out. They should be a thin layer. You may want to have an extra can of sweetened condensed milk on hand just in case you run out!
  6. Once finished, cover with plastic wrap and refrigerate overnight to set. Then just slice into rectangles and serve!
Recipe Notes

I have included an extra plain gelatin and sweetened condensed milk in case you run out as some readers have.