July 19, 2015

Rainbow Finger Jello

Rainbow Finger Jello 彩虹果凍

Rainbow, Finger, Jello,  彩虹, 果凍
By Published: 2015-07-19
Lazy, slow and hot summer days...looking for ways to fill the endless time, desperate for ways to cool yourself down.  Jumping into a blue, blue square of pool, water splashes high into the hot, hot air.  Tearing greedily into an ice cold slice of the reddest, sweetest watermelon you ever had.  Running squealing with happiness through the sprinklers on a green patch of lawn.  Catching the rainbow in the air as you jump high through the cool water.  And best of all, having some of the most yummilicious summer treats of all, those cool, wobbly, translucent blobs of pure glowing color that you can hold in your fingers and bite right through and let slide down, cool and sweet, right into your tummy.  Rainbow Finger Jello 彩虹果凍 is summer in a bite...the magic of rainbows cast into jingly, wobbily delicious life as a cool, fun to play with and super easy to make jello-y summer treat. 

Rainbow, Finger, Jello,  彩虹, 果凍, recipe, summer treat
photo credit - Georges Noblet

The trick of these easy to make beauties is an understanding of the most basic properties of color.  This Rainbow Finger Jello only requires three colors of blue, yellow and red to make and yet, as you can see, in the final jello-y goodness all the colors of the rainbow are present!  How could this be so?  Well here is a color wheel to refresh our memories:

Rainbow, Finger, Jello,  彩虹, 果凍, recipe, summer treat

Because our jello has the three primary colors of blue, yellow and red and because it is translucent and allows light to pass through, the primary colors mix with neighboring color and create the illusion of the secondary colors of orange, violet and green.  Red mixed with blue makes violet.  Red mixed with yellow makes orange.  Yellow mixed with blue makes green.  Therefore you hold up your Rainbow finger jello and see all the colors of the rainbow!

Rainbow, Finger, Jello,  彩虹, 果凍, recipe, summer treat

This project started out as a "take to school" treat for my little girl's school.  We were going through the different options when we discovered that we could make rainbow hued finger jello.  Whoopee!  Rainbow time!  So we started right away.  The first batch we made got eaten up right away, lickety-split, by ourselves, being too delicious to resist.  Who can resist an edible rainbow?  So we ended up making a couple more batches for school.

Rainbow, Finger, Jello,  彩虹, 果凍, recipe, summer treat
Rainbow, Finger, Jello,  彩虹, 果凍, recipe, summer treat

The great thing about jello is that it's an easy to make treat that kids can do all by themselves, with supervision of course.  So my little girl made the first batch of this rainbow finger jello all by herself, mixing and stirring away happily, sneaking pinches of the sweet gelatin powder when she thought I wasn't looking.  It was a real treat to see her incredulous face when we cut out the first squares of rainbows and held them up to the light!  Pure magic!

What are y'all waiting for?  Make some Rainbow Finger Jello magic today!!

 Rainbow, Finger, Jello,  彩虹, 果凍, recipe, summer treat

Rainbow Finger Jello Recipe   彩虹果凍

1 shallow glass baking dish, approx 13" by 8"


1 box blue jello, 6 oz or 160g
1 box  yellow jello, 6 oz or 160g
1 box red jello, 6 oz or 160g
1 box unflavored gelatin, 1 oz or 35g
6 cups boiling water
1 1/2 cup iced water

Put 1/2 cup of room temp boiled water into the freezer for 10-15 mins or until very chilled.  Prepare boiling water.  In large mixing bowl pour in blue jello powder and add in 1 packet or 1 tbsp of unflavored gelatin and stir to mix.  Pour in two cups of boiling water.  Stir until gelatin dissolved.  Pour in chilled water from freezer and stir.

Grease the baking dish with a layer of oil.  Pour gelatin into baking dish and use a spoon to skim off all the bubbles.  (You want to do this thoroughly as bubbles will leave a mark on the jello if left to set.)  Put in the fridge and let set for 30-40 mins or until the jello is firm to the touch but still a tiny bit tacky.  

Repeat the above steps with the yellow color and last of all, the red color.  Be sure to get the colors in the right order, blue, then yellow, then red, or the rainbow won't appear!

When the rainbow jello is completely set, use a sharp knife to loosen the edge around the baking dish.  Then use your fingers to gently pull the jello away from the side.  It should be easy to detach.  Cut out desired shapes and then remove one by one from the dish to serving tray.  Cover and keep in the fridge until serving.

More Summer Delights at The Hong Kong Cookery:

hong kong lychee popsicleLychee Popsicle 

Fruit Jelly Candies RecipeFruit Jelly Candies

fruit, passion fruit, tropical fruit, ice cream, recipePassion Fruit Ice Cream 



  1. Hello,

    I wanted to tell u how much my twin daughters (now 12 y/o; were 10y when first made this recipe) and myself enjoy both preparing as well as eating (of course lol) this amazing treat!

    I care for my elderly parents full time (we live in) and they both have always loved regular jello but since trying your recipe, they don't ever want to go back to plain regular jello. aha! That's fine with us however, because it gives us an excuse to treat ourselves as well.

    I've heard just a couple of people complain that they feel it to be somewhat time consuming, however, we rather enjoy that aspect because since the steps require that we remain in somewhat close proximity with the kitchen, we use it as an opportunity to spend quality time with each other-- free of our devices that tend preoccupy us so often. Oh, the exception being my phone, but its justified as I only utilize it to access your recipe page so we can remain on track! lol!

    Oh and I agree with you about the recipe being easy enough for the kids to do themselves. My two, however, prefer if mum is involved-- which is fine with me because as I mentioned, we love the quality bonding time it affords us.

    I digress, 🙀 I must apologize for rambling here 😸 and I do thank you if you made it this far without getting bored & jumping ship to skip to the end of this comment...aha! 😹😹

    Thank you again for sharing this delicious and beautiful recipe treat for everyone to enjoy. I'm SO pleased to have discovered it amongst the sea of other 'finger jello' recipes online and hope that you don't mind if I also share it with friends & family (with proper credit and such given to you, of course!). It must be the very best one available online; i've not ever tried any of the others nor do I need to because it simply does not get better than this! 😻 Take care and stay blessed. ❤❤

    Sincerely yours,

    Kim, Ali (aka Kaisoo) & Ari (aka Baekyeol) 😽😽

    1. Dear Kim, Ali and Ari - I'm so happy that you all enjoyed our rainbow jello recipe so much! I make it with my little girl as well, and it's always wild to finish and discover the real rainbow inside the jello. Thanks so much for writing in and sharing your lovely comments and I absolutely agree with you on how important it is to stay close to the kitchen and make and bake to bring your family and friends close and happy! Best rainbow dreams to you all! ~ellen


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