Rainbow Jello Recipe & Instructions

We celebrated Danika’s 5th Birthday this year with a rainbow unicorn party! The kids always get to pick their theme and I think it’s become a favorite thing to do. I then take it and run with it! This week I’ll be sharing all of my ideas from her Rainbow Unicorn themed party and I had to start with my favorite (and the most aw inspiring thing at the party), Rainbow Jello! It looks difficult, but while it is time consuming, it is NOT difficult!

Rainbow Jello

The trick to making the rainbow jello is to create thin layers and let them set completely before pouring the next layer. It’s important to follow the directions exactly and let each mixture cool enough so that it doesn’t end up melting the layer below it when you pour it on.

Rainbow Jello Recipe

Here is what you need:

6 small packages (3 ounces) of different Jell-O (I used rainbow colors however you can use as many or as few colors as you’d like)
4 packages Knox unflavored gelatin
1 (14 ounce) can Sweetened Condensed Milk

Rainbow Jello Recipe

You will make this in a glass 9×13 pan. I did not spray mine with cooking spray and it came out beautifully.

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. 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.

Second layer: Mix 1 envelope Knox gelatin 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.

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. Once you run out of white mixture then Mix 1 envelope Knox gelatin 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.

Once finished, cover with plastic wrap and refrigerate overnight to set good. Then just slice into rectangles and serve! It was delicious too!

I began my layers with purple then blue, green, yellow, orange, and red so they would be in correct rainbow order. Remember Roy G. Biv! Red, Orange, Yellow, Green, Blue, Indigo, Violet. We skipped indigo 🙂 In order for them to be red on top, purple on bottom, we started with purple and worked backwards. Of course you’ll also have a layer of white in between each.

Rainbow Jello Recipe

This was definitely the talk of our party and elicited many “oohs” and “ahhs”!

Rainbow Jello Recipe

Yields 24

Rainbow Jello Recipe & Instructions

Beautiful rainbow jello that can be modified for many different occasions!

5 hrPrep Time

5 hrTotal Time

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Ingredients

  • 6 small packages (3 ounces) of different jello colors
  • 4 packages Knox unflavored gelatin
  • 1 (14 ounce) can sweetened condensed milk

Instructions

  1. You will make this in a glass 9x13 pan. I did not spray mine with cooking spray and it came out beautifully.
  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. 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 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. Once you run out of white mixture then Mix 1 envelope Knox gelatin 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.
  5. Once finished, cover with plastic wrap and refrigerate overnight to set good. Then just slice into rectangles and serve! It was delicious too!
Cuisine: Dessert | Recipe Type: Dessert
http://musthavemom.com/rainbow-jello-recipe-instructions/

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Comments

  1. I used to make this for my kids when they were little. It was a huge hit at family gatherings with all the nieces and nephews too. Yummy and fun!!

  2. jamie braun says:

    wow, that looks amazing! I would absolutely LOVE to try it, but i 100% know i would mess this up for sure! it would be fun to make with the kids and see how it turns out though!

  3. That is incredible. I am almost 100% certain mine would end up like one of those “Nailed It” memes lol

  4. This looks so awesome! I really need to make this for my kiddos!

  5. Janet W. says:

    Wow you did such a good job! It doesn’t sound too difficult. What a great addition to your party!

  6. shelly peterson says:

    This looks pretty cool and prolly even better to eat! It does sound time consuming but worth it. will have to try this 🙂

  7. This looks amazing, but I’m afraid mine would turn out poorly

  8. This looks amazing! I may make this for my party on Sunday!

  9. This was awesome! Tasted as good as it looks and I usually don’t like jello!

  10. That is SOOOOOOO cool. I’m impressed!

  11. Amanda says:

    oooo pretty!

  12. Bekah Kuczenski says:

    This looks awesome! I love jello! This directions seem easy enough, but it does sound time consuming … I really want to try this!!

  13. courtney b says:

    wow so pretty! I love this for a little girl (or boys) bday party !:)

  14. Toni Marie Caravello says:

    Wow, these would be great at my daughter Minnie Mouse Party in a few weeks. I am going to have to practice making some or recruit someone who is really good with this kind of stuff.

  15. My grandson would just love this since he is a big jello lover! Reminds me of the Ribbon Candy you can get at Christmas time!

  16. Cara Daymude says:

    Love this recipe thanks for posting repined

  17. This is such a fun and visually stunning recipe! My girls don’t even like Jell-o and I’m tempted to make it.

  18. SARA Abernathy says:

    My Daughter LOVES Jello And Rainbows! I Will Have To Make This For Thanks For The Recipe!

  19. This looks so incredibly cool!! I’m not a *huge* jell-o fan, but I’d make it just because it’s FUN to look at!! 🙂

  20. Stacy Riggs says:

    Great recipe- the only glitch was there was not enough of the condensed milk mixture to do one in between each of the six colors. I had to go back to the store to buy another can of the condensed milk- that or decide to skip the orange. After several hours of this, I was not going to settle for anything less than the picture.

  21. This is really neat looking, but I wonder at my ability to pull it off! I’m going to try, but it seems like one of those things where you end up with the “this is how it’s supposed to look” pictures next to the “my result” picture that looks like someone stepped on it… (I’m not crafty in the kitchen… )

  22. Hello! I’ll definitely try your recipe… just wondering if this is likely to melt on a very hot day? We have started with very hot weather already in Australia!
    Thanks for sharing!

    • Once it has set it holds the consistency like Jell-O jigglers would. Not sure if you have an issue with those or not but I would just keep it on a tray of ice (ice underneath the tray).

  23. Oh this looks so neat! I am going to have to try this with reds and greens for Christmas! Fun!

  24. Can we make this in a jello mold?

    • You can make it in any mold. However, I suggest you use clear molds so you can see the layers as you pour since some of the readers run out of the milk layer. Depending on your mold, your milk layers will not equate to the same measurements as the colors. My mom made this when I was growing up and then I took over as a mom myself. What is not explained are some errors, that if you wait too long to pour layers, the layers will not stick to one another then when you slice the layers split when eating pieces. I made this mistake among pouring too quickly and the layers below melted too. It is 5 hours or more depending on your fridge…but it’s constant and you should not be interrupted. also to cool jello faster don’t leave in same pan to cool, I suggest pour off into glass measuring (some plastic stains) cup to cool. If you just happen to pour too hot and it melts, don’t fret, it will taste the SAME, just adds character. no need to toss out and start over, just keep pouring till you are finished. this happened to both my mom and myself and we just let it go and it turned out pretty good because it created unique designs in the Jell-O. Once again, it tasted ALL the same…just yummy

      • Thanks for the additional tips! And as for some running out of the milk layer, I made mine thinner than the colored layers so that could explain why 🙂

  25. A tip: make sure your pan is on a perfectly level surface while setting. Apparently the shelf in my fridge is off kilter, which I didn’t realize til I poured my first white later and discovered it to be thin on one side and thick on the other, oops! So I put a kitchen magnet under one side to raise it up to even out a bit. Not perfect but tastes the same anyway haha.

  26. Jesselyn A/Jesstinger says:

    Wow! These are totally amazing! (Already pinned on two boards) They look like impossibly difficult to make for anyone who isn’t at least a professional dessert-maker. Never the less ~ I am going to take it on and master it for a very specially member (the patriarch really) of our extended family – whose lovely house we traditionally all have Thanksgiving dinner at.

    Each of use is responsible for bringing certain dishes for the big dinner I always make several of my specialties (sides appeitizers and one of the dessert pies)… But I want do do something special for our special host who is turning 95 this month and who absolutely LOVE JELLO / Jello Molds (he’s a retired OB-GYN – who love jello) and this is about the most impressive Jello masterpiece I’ve ever seen!

    If I can pull it off ~ and everyone else at the table will be DAZZLED! Thanks!

  27. Just wanted to tell you how great this recipe is. I live in Melbourne Australia and all my friends here in Australia has not seen a dessert like this and are amazed and I told them I used your recipe and have directed them here. Thank you so much.

  28. vickie couturier says:

    my grandkids saw this picture and went nuts for me to make it so im going to give it a try

  29. Arlene Balestreri says:

    I have made these for easter this year. Looking forward to sharing tgem with my family, along with hello jigglers I made too.

  30. Thank you for the recipe! Would it be alright to make this 2 to 3 days in advance? Im worried about the colors running into the condensed milk layers. Thanks!

    • You’re welcome! I haven’t made this more than a day ahead of time but I think as long as it stays in the fridge it would be just fine for a couple days! Once it sets up then it’s nice and set and doesn’t run.

  31. Wow, everyone made this, and no one commented on the ingredient list only calling for (1) 14oz can of sweetened condensed milk, then the directions reading like you need at 2-3 cans of it? Just getting started, but it doesn’t add up.

    • Sorry for the confusion. You use 1/2 of the can with water and gelatin to start. Then once this is used up you will use the other 1/2 of the can. If you use the while can at once and mix it all up, it will set before your layers have time to fully set up. Hope that helps!

  32. I am surprised no one has commented about the incorrect instruction of the white layer. This set of instructions is either incorrect or misleading:

    Second layer: Mix 1 envelope Knox gelatin with 1/2 cup hot water until dissolved. Add 1/2 can condensed milk and an additional 1/2 cup hot water.

    This is way too much water and the white layer will not set. I tried to make this for my daughters birthday party and the whole thing was ruined.

    • I’m so sorry this didn’t turn out for you. But I did use one cup total of hot water for this step. The instructions are correct. Did you make sure the gelatin was dissolved well? That could lead it to not set up.

  33. Did anyone else have trouble with the white section getting chunks after one set?

  34. Could I do half a cup of boiling water and half a cup of cold water so the layers set quicker?

  35. my grand daughter is allergic to milk. Can I use almond milk in place of the condensed milk?

  36. Can these beautiful layers be done in a large glass truffle dish? I would have to transport to the event in a ready to serve fashion, and was thinking a triffle bowl would transport easily while still being able to see the beautiful colorful layers.

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