Dazzling Low-FODMAP Rainbow Celebration Cake / White Wedding Cake; Gluten-free

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This low-FODMAP rainbow celebration cake is the most dazzling low-FODMAP treat you will ever have!

You can change it up:  use black and orange colors for Hallowe’en, add sprinkles instead for a low-FODMAP confetti birthday cake…so many choices!

Or just keep it plain white and enjoy at a wedding or other special occasion. It makes an ideal low-FODMAP White Wedding Cake.  Use my low-FODMAP White Buttercream Frosting for the perfect combination.

This low-FODMAP cake is gluten free and tastes fantastic.

For another great party treat- try my low-FODMAP White Chocolate Rainbow Bark recipe; or check out over 300 more low-FODMAP recipes on my blog 🙂

Be healthy and happy,

Rachel Pauls, MD

Dazzling Low-FODMAP Rainbow (White) Birthday/ Wedding Cake; Gluten-free

Prep time: 15 min

Bake time: 20 min

Total time: 35 min (plus additional time for frosting/decorating if desired)

Bake 375 F


  • 2 x 9 inch round cake pans
  • Can also make 24 cupcakes

Although this recipe has not been tested, a single serving should be low-FODMAP based on the ingredients

Serves 24


  • 1 & ½ cup sugar
  • ½ cup (8 TB) unsalted butter
  • 4 large eggs
  • 2 cups Authentic Foods GF Classical Blend flour (you can use other Gluten-free flour, see why I prefer this one)
  • ½ tsp salt
  • 1 TB baking powder
  • ½ tsp xanthan gum (if your flour has this added already, can omit)
  • ¾ cup lactose-free low-FODMAP milk (I used almond milk)
  • 2 tsp vanilla extract
  • Assorted food colorings of your choice



  • Preheat oven to 375
  • Line two 9 inch round pans with parchment and spray
  • Beat butter and sugar in large mixing bowl and add eggs one at a time blending well between each one
  • Scrape down bowl, bottom and sides
  • Add flour, salt, baking powder, xanthan gum, milk and vanilla
  • Beat on medium for 1 minute
  • Separate the batter into 6 or more small bowls
  • Add food color one drop at a time to each and lightly stir until desired color
    • I mixed yellow and green to make light green, and blue and red for purple 🙂
  • Drop batter into pans in random fashion
  • Bake for 20 minutes, until toothpick in center comes out clean; as ovens vary your oven may take more/less time
  • Cool for 7 min, invert cake and cool further or freeze until use
  • Frost with vanilla buttercream and garnish with sprinkles, candies or other decorations
  • Moist and yummy!

  • This low-FODMAP Rainbow Celebration cake is so much fun to eat!

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2 Responses

  1. I made this cake for my niece’s 18th birthday. I used King Arthur 1:1 gf flour and dropped each color in the center of the color before, banging the pans to spread layer. I put the colors in opposite patterns between the two pans so the “rainbow” was reversed when you cut through. The icing was Amazing! My family couldn’t believe this was gf and low fodmaps. Delicious!

    1. Hi Alex,
      Wow that sounds amazing! So glad this was a success. Thank you for your comments 🙂

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As an IBS-sufferer myself, I know how badly you want to feel healthy and happy. I’ve spent over a decade researching IBS and FODMAPs, and my recipes and guidance will help you succeed.

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