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Flour Shop Rainbow Explosion Cake Kit

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We teamed up with Amirah Kassem's Soho-based Flour Shop bakery to bring you this exclusive kit for whipping up your own version of the Instagram-famous Rainbow Explosion Cake at home. Start by combining the premium cake mix and coloring gels to bake the six rainbow-hued layers, then use the cream cheese frosting mix and colorful candies to frost, fill and decorate your surprise-filled dessert.

Set includes:

  • 1 pouch Magical Vanilla Cake Mix
  • 6 Rainbow Coloring Gels
  • 1 pouch Magical Frosting Mix
  • 1 pouch Rainbow Explosion Mix (sprinkles)
  • 1 pouch Rainbow Polka Dots (sprinkles)
  • 4 lb. 5 oz. total.
  • Made in USA.
  • Cake Mix: Unbleached flour (wheat flour, malted barley flour, niacin, reduced iron, thiamin mononitrate, riboflavin, folic acid), sugar, non-aluminum baking powder (sodium acid pyrophosphate, bicarbonate soda, cornstarch, monocalcium phosphate), Bourbon vanilla powder, sea salt.
  • Frosting Mix: Powdered sugar, natural vanilla powder.
  • Sprinkles: Sugar, cornstarch, FD&C colors Red #40 Lake, Red #3, Yellow #5 Lake, Yellow #6 Lake, Blue #1 Lake, carnauba wax.
  • Liqua-Gel Color Pack: Water, high-fructose corn syrup, glycerin, sugar, Yellow #5, modified food starch, Red #3, Blue #1, Yellow #6, carrageenan gum, sodium benzoate (preservative), potassium sorbate (preservative), citric acid, xanthan gum, Red #40.
  • Rainbow Explosion Mix: Sugar, cornstarch, hydrogenated palm kernel oil, soy lecithin, gum arabic, confectioners' glaze, carnauba wax, reduced protein whey (milk), cocoa, corn syrup, tapioca dextrin, salt, Yellow #6, Yellow #5, Blue #1, Blue #2, Red #40, Red#3, titanium dioxide.
  • Rainbow Polka Dots: Sugar, cornstarch, Red #3, confectioners' glaze, carnauba wax, Yellow #5, Blue #1, Blue #2, Yellow #6, Red #40.
  • Contains wheat/gluten, tree nuts.
  • This product is prepared and packaged using machines that may come in contact with wheat/gluten, tree nuts, peanuts, soy.

Shipping Information

UPS can deliver most in-stock items within 3–5 business days. UPS is unable to deliver to P.O. boxes.

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Orders received by 9:00 p.m. ET Monday through Thursday will arrive the next business day; orders placed Friday through Sunday will arrive on the following Tuesday.

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If within 30 days, you are dissatisfied for any reason, you may return your purchase for a refund of the merchandise value. An original receipt or gift receipt is required for all returns and exchanges. Returns with a gift receipt will be refunded in the form of a Merchandise Credit for the amount indicated on the gift receipt. Returns with original receipt will be refunded in the original form of payment, cash and check refunds over $100 will be issued as a company check (may take 14 business days from time of request).

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  • Rated 5 out of 5 by from Big Hit! Loved this kit. There were plenty of ingredients. There’s nothing worse than running out of icing and that didn’t happen with this kit. The instructions were easy to follow and the colors were so vibrant. It defiantly wowed at my granddaughter’s 6th birthday party. Oh, did I mention how delicious this cake was. So good!
    Date published: 2019-10-10
    Rated 5 out of 5 by from You can do this! This was a really fun activity and we involved all three of our kids. The most important ingredient: time. Give yourself a couple of days to do it right and be sure to read the directions a few days ahead so you have everything you need and have enough prep time to have some ingredients at “room temperature”. Also, it’s really good to refrigerate at certain times as the directions indicate. We had a very happy birthday girl when the final product was revealed!
    Date published: 2019-07-22
    Rated 5 out of 5 by from Fun to make, pretty to look at and delicious It was a lot of work but still fun. The directions didn’t have a baking temperature so I baked at 350. Don’t let anyone tell you everything you need is in the can - needed unsalted butter, milk, cream cheese and eggs. I used 2% milk and Neufchâtel cheese because that’s what I had and it came out great!
    Date published: 2019-06-23
    Rated 5 out of 5 by from Joy in a can! Made this cake with my kids a few days ago. It was so fun to make and it tasted delicious. Turned cut beautiful. Was much shorter than the picture but may be my error
    Date published: 2019-06-18
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  • What is the shelf life of this cake and the accompaniments? I'm considering buying it now and making it a few months from now.

    Asked by: NIKKIB
    Hi NIKKIB, For the current batch we have available to ship, the best by date is November 2020.
    Answered by: Williams Sonoma
    Date published: 2019-07-21

    My husband threw away the directions to make the rainbow explosion cake!  I found the video but it doesn’t have the amount of unsalted butter etc. Help!

    Asked by: Alice
    Hi Alice, The kit includes all ingredients except : Cake: 1-1/2 sticks butter (unsalted), 1-1/3 cups milk, 3 large eggs (all at room temp) Frosting: 6 oz (1.5 sticks) unsalted butter, 12 oz cream cheese, (all at room temp)- will need a mixer with whisk.
    Answered by: Williams Sonoma
    Date published: 2019-07-15

    Can I use 6” round cake pans that are 3/4” tall? Or does it have to be 2” tall?

    Asked by: Allison
    Hi Allison, If you use anything shorter than 2" deep cake pans, we feel that it'll be difficult to handle the cake layers without them breaking apart as you're trying to stack them on top of each other.
    Answered by: Williams Sonoma
    Date published: 2019-06-03

    Does this come with instructions and cream cheese frosting recipe? 

    Asked by: Nidhi
    Hi Nidhi, Yes, recipes for the cake and frosting as well as instructions are included with the kit.
    Answered by: Williams Sonoma
    Date published: 2019-05-24

    Is the cutter to make hole in the center included in this package? Which 6” cake pans would you recommend with this?

    Asked by: Nidhi
    Hi Nidhi, No, the cutter is not included in the kit. As for the 6" pan, this is the one Amirah recommends:
    Answered by: Williams Sonoma
    Date published: 2019-06-28

    How many servings do you get in the flour shop explosion cake kit?

    Asked by: Anniecap
    Hi Anniecap, The cake makes one 6" cake with 6 layers. Serving size depends on how thin of a slice you cut.
    Answered by: Williams Sonoma
    Date published: 2019-05-24

    Does the cake mix included cover all those layers? If so, what size layer does it make?

    Asked by: stephanie16
    Hi stephanie16, The set includes enough cake mix and color gels to make all the layers: • 1 pouch Magical Vanilla Cake Mix • 6 Rainbow Coloring Gels • 1 pouch Magical Frosting Mix • 1 pouch Rainbow Explosion Mix (sprinkles) • 1 pouch Rainbow Polka Dots (sprinkles) You will need six 6" round cake pans to bake all layers at the same time. Each layer will be 2" high.
    Answered by: Williams Sonoma
    Date published: 2019-04-29
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