How to Make a Hydrangea Flower Cake


I have very little experience but I love flower cake decorations. So today I tried my luck and made a hydrangea flower cake.

Two weeks ago I made cupcakes with buttercream frosting roses. They were such a hit I thought it might be fun to make a dessert that fits with our blue and green and purple spring decor. What do you think of my hydrangea flower cake?

How to Make a Hydrangea Flower Cake*

I love this cake. It so reminds me of hydrangeas and I cannot wait to serve this cake to my family.

Hydrangea Flower Cake

How to Make a Hydrangea Flower Cake

Baking a cake is a fairly easy task.

The tricky part is adding the frosting. I thought about adding roses to the top of the cake. That would have been very fun. And in case you missed it, I decorated these cupcakes two weeks ago and taught myself how to make roses.

You can learn how to make these buttercream frosting roses here.

But I thought I should try something different.

Remember the amazing table I created last week for Hobby Lobby? I used some hydrangeas for the centerpiece on the table and I was inspired by them to decorate this cake.

Of course, I had to add a bit of pink frosting but don’t you think the cake decoration looks like the hydrangeas?

How to Make a Hydrangea Flower Cake.

It might be a stretch but I love it.

How to Decorate a Hydrangea Flower Cake

How to Make a Hydrangea Flower Cake 10

This cake wasn’t that hard to make. I baked three white cakes in 6″ pans. When the cakes were baked, they came out with a cone on the top so I cut off the tops so that the cakes were flat. I turned them all upside down and frosted the cake with white buttercream frosting.

Then came the fun part.

How to Make a Hydrangea Flower Cake

To make my Hydrangea Flower Cake, I used my Buttercream Frosting Recipe which is pictured below. I doubled the recipe to make enough for this cake.

Start by frosting the cake with white icing first but use it sparingly. Add frosting between the layers and a very light coat of frosting on the outside and top. Use a thin coat since it will be topped with the decorated icing.

Put the entire cake in the freezer for about twenty minutes to cool it off and make it easier to decorate.

Next, divide the remaining frosting into four cups and use cake decorating coloring to make frosting in pink, purple, blue, and green.

Buttercream Frosting Colors for Flower Cake

To make a more muted color, I added a small amount of purple frosting to the other colors. I wanted the colors to more closely match the grey tones of the hydrangea flowers and not bright color tones.

Next, I placed the four frosting colors in the decorating bag with a large TMK2D icing tip (the tip is listed below in the pack of steel piping icing tips).

Adding the frosting was easy, all you do is hold the tip about 1/4 inch from the cake and squeeze out the icing. Once you have the amount of icing you want, press the tip on the cake again to make the flower. Continue adding flowers around the cake.

The colors will change as you continue adding flowers around the cake.

Look how fun this looks!

You can watch this video to see how to make these flowers.

Here are a few progress shots as I kept turning the cake to add more flowers. It didn’t take long to decorate the cake with the flowers. Maybe about twenty minutes?

Yield: one three tier 6: cake

How to Make a Hydrangea Flower Cake

How to Make a Hydrangea Flower Cake Final

I doubled this recipe to make the three-tiered cake.

Prep Time 15 minutes
Cook Time 15 minutes
Total Time 30 minutes


  • 1 cup nonsalted butter (do not warm)
  • 4 cups powdered sugar
  • 1 tsp vanilla
  • 4 - 6 TBL coconut milk (I like Thai Kitchen Organic)


  1. Cream the butter until soft in a mixer for about two minutes.
  2. Add the sugar, vanilla, and three TBL of coconut milk.
  3. Add the remaining TBL of coconut milk as needed. If you are making flowers, make sure the frosting is thick so it will hold its shape. If it gets too soft, place it in the refrigerator for about twenty minutes.
  4. When frosting the cake, place it in the freezer for about one hour before decorating.

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All of the materials you will need to make this amazingly beautiful and yummy hydrangea flower cake:

How to Make a Hydrangea Flower Cake

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