Rainbow Jello Cake

The layers of this Rainbow Jello Cake will add a colorful pop and jiggle to any table! To get all the colors of the rainbow, you use almost every jello flavor and as a result, the cake tastes like fruit punch!

4.34 from 3 votes

Print Pin

Course Dessert

American

Prep Time: 4

Total Time: 4

Servings:

Ingredients

▢ 6 packages of 3 oz jello in assorted flavors suggested: grape, berry blue, lime, lemon, orange and strawberry
▢ 12 teaspoon unflavored gelatin
▢ 14 ounce can sweetened condensed milk
▢ 8 cups boiling water divided

Instructions

Lightly spray a 9 x 13 pan with non-stick spray and set aside.
In a small mixing bowl, mix the package of grape jello with 1 teaspoon of gelatin and 1 cup of boiling water. Whisk until completely dissolved.
Pour the mixture into the 9 x 13 pan. Then, place the dish in the refrigerator until the jello sets, about 20-30 minutes. Make sure to place it on an even surface so that you get even layers.
While the first jello layer is setting, make the mixture for the layers of condense milk. Start by adding 2 teaspoons of gelatin to 1 cup of boiling water and whisk until it's dissolved.
Add ½ can of condensed milk (just over ¾ cups) and mix to combine. Let the condensed milk mixture sit on the counter to cool while the purple jello layer is setting in the fridge.
Once the jello is set and the condensed milk mixture has cooled, pour ¾ cup over the condensed milk mix over the layer of grape jello. Return the dish to the refrigerator to set for another 20 minutes. Cover the remainder of the condensed milk mixture with plastic wrap while it’s not in use and leave on the counter.
Prepare the next layer of jello (the blue berry) by mixing the package of jello, 1 teaspoon of gelatin, and 1 cup of boiling water and whisking until dissolved. Let this sit on the counter while the layer of condensed milk is setting in the fridge.
Repeat this process alternating between layers of jello and the condensed milk mixture, which you'll need to make the rest of half way through.
The layers should go from bottom to top in this order: grape, condensed milk mixture, blue berry, condensed milk mixture, lime, condensed milk mixture, lemon, condensed milk mixture, orange, condensed milk mixture, strawberry.
Serve with whipped cream and rainbow sprinkles!

Notes

I like to fill up a pot with about 8 ½ cups of water and leave it on the stove to boil whenever it’s time to create a new layer of jello. I add the extra ½ cup because some of it will likely burn off as steam in the process. You can of course boil a cup of water one cup at a time as the instructions call for it!
I suggest making the condensed milk mixture in two stages because it will begin to set as time goes on.
Mix the condensed milk, gelatin, and water in a measuring cup so that it's easily pourable and you can measure how much you pour out at the same time. Keep the measuring cup covered with plastic wrap in between use.
Use a clean bowl for each flavor of jello. You don't want some of a leftover color to mix into your current one!
Don't pour your jello or condensed milk in just one spot when adding them to the cake. Pour evenly across the previous layer, otherwise, you may end up drilling a hole into it!
Let each mix come to room temperature before pouring it. I like to prepare either the jello or condensed milk for the next layer after placing the cake in the fridge. That way it can cool down as it sits on the counter.

Nutrition

Please note, Holiday Sweets N Treats isn't a professional nutritionist. Any and all nutritional information shared is an estimate. If you're following a specific diet or counting calories, we suggest you use the nutrition calculator of your choice. Calories can vary depending on the brands and products used.

Tried this recipe?Mention @holidaysweetsntreats or tag #holidaysweetsntreats!