Friday, June 18, 2010

Rainbow Jello Cake

Today is Ethan's Birthday celebration at his Kindergarten glass, I made a beautiful Rainbow Jello Cake, however, when transporting it into my husband's car, we managed to completely brake it !! What a disaster ... you should have seen my face, tears were running down my cheeks as I have slaved 9 hours in total for this. Ethan still insisted of bringing it to his class, even though I refused as I would never let anything BUT a perfect homemade item leave my house. But what can I do ???? I had nothing else prepared and another one would take another 9 hours to make. At least I was able to take a beautiful picture before the big disaster ......

Rainbow Jello Cake, adapted by Rachel Perlow
8-3/4 c Boiling Water
7 pkg flavored Gelatin, 1 each of the 6 different colors of the rainbow, plus one extra, either red or purple*
1-1/4 c Vanilla Yogurt (smooth and creamy works best), or sour cream, or cool whip

Line up your boxes of gelatin in rainbow order, next to 5 large cups, and one quart sized bowl. Put each flavor of gelatin in its own bowl or cup, use the larger one for the double batch. Stir 1.25 cups boiling water into each flavor at least 2 minutes until completely dissolved (do one at a time, to make sure each is completely dissolved), use 2.5 cups for the double batch.

Lightly spray a 10 cup Bundt pan with cooking spray, wipe out excess with a paper towel. Beginning with your first color, either red or purple, whichever you DID NOT buy two packages of (I start with purple), pour 3/4 cup of the dissolved gelatin into the bundt pan. Refrigerate about 15-20 minutes or until set but not firm (gelatin should feel tacky and stick to finger when touched).

Meanwhile, stir 2 Tbsp. of the yogurt into the 1/2 cup of dissolved gelatin remaining in the cup, use a small whisk or fork to get out all the lumps. Leave the rest of the flavors at room temperature, lightly covered with plastic wrap.

Spoon the creamy gelatin over the set, but still tacky gelatin in pan. Refrigerate about 40-45 minutes or until gelatin is set but not firm (gelatin should stick to finger when touched).

Repeat this with each remaining gelatin flavor. If the gelatin waiting to be used sets at room temperature, fill a bowl the cup will fit into with hot water and stir to loosen it up again. Refrigerate gelatin as directed to create a total of 12 alternating clear and creamy gelatin layers. See tips below.

Refrigerate overnight until firm. Unmold & Enjoy !!!!


When making all the gelatin at once, instead of using bowls, the gelatin can be made in large, individual, plastic cups (facilitates cleanup). Mark each cup with its flavor and line the cups up in the order they are going into the mold. Put each color of gelatin in its own cup. This saves having to reboil water every 1/2 hour. Leave the gelatin waiting to be layered on the counter, at room temperature, lightly covered with plastic wrap.

Mold type and size: This is a versatile recipe, and special molds aren’t needed, but a bundt cake pan makes a beautiful mold. To calculate the mold's volume, fill it with water to measure it. Plan on 1-2/3 cup of gelatin per box. For a 10-cup mold, seven boxes of gelatin work well. If you are using a smaller mold, use less of each flavor, fewer colors, or make a second "sampler" serving. Even for a large mold, making a small sampler in a clear glass will hit the spot after taking 3 hours to make this and not being able to have any until the next day.

Order: For a nice look the colors of the rainbow (red, orange, yellow, green, blue, violet) are most commonly used, but variations can be beautiful. For example, school colors for a school banquet or bake sale, or colors appropriate to a holiday, i.e. red and green at Christmas.

Setting: To set properly, the gelatin must be cold and not warm when it is put in the mold. It is also important that the layers are tacky to the touch and not solidly firm, as each successive layer is added. Otherwise the layers may not stick to each other. To prevent the layers from cracking as each layer is added, pour the gelatin over a spoon to break the fall, close down to the set gelatin. Each time the mold is put into the refrigerator to set, give it a quarter turn. This will keep the layers even. It takes less time for each progressive layer to set.

Unmolding: For best results, unmold just before serving. Fill a larger container or clean sink with warm water, not too hot (otherwise it will melt). Rub a few drops of water onto the serving plate, this will facilitate adjusting the mold after unmolding, if necessary. Either use a plate with a large lip and just a little bit bigger than the diameter of the mold, or use a larger platter, at least 2-3 inches larger than the mold, because it will spread when unmolded and cut. Dip the mold almost to the edge into the warm water for just a few seconds. Wipe off with a towel and check the edges to see if they are loose, if not, repeat the dip for just a few seconds. Invert serving plate on top and flip quickly. Having a spotter brings peace of mind!


  1. thanks for sharing the procedure and some tips on how to make your rainbow jello cake. the color is very nice, good for kids. i think my daughter charlotte,5, will be glad to have it on her 6th birthday next month. (but my wife should be very patient as you did to have this awesome rainbow jello cake, :P )

  2. You are very welcome .... the kids loved the rainbow jello cake ... it's worth all the hard work !

  3. how do u make its shape if u dont have the pot thing?

  4. If you own a bowl, it would come out just as nice !!! Good Luck !!!

  5. Im so sorry for your loss, but the picture is breathtaking. My mother has a similar story, with a ginger bread house. Best Wishes.


  6. nice post. i love the rainbow color cake. good for my kids.

  7. i made this and it came out amazing! i got rave reviews! thanks for sharing!

  8. I made this for a piano recital, and it turned out great! Everyone was asking for the recipe! Amazing! Thanks for the recipe!

  9. It turned out amazing at my daughters Birthday Party! Thanks for the amazing recipe! :)

  10. So amazing. I made this for an 18th Birthday and added a little bit of vodka in it and still turned out exceptional. thankyou.

  11. I'm going to try this today - however, I am adding vodka to each flavor to make a grown-up only cake for a party tomorrow. Thanks so much for such detailed instructions and the tips!