This process can help tie the color palette together better than mixing each of the 6 colors individually. The thing that makes this rainbow color palette extra cohesive is mixing up the primary colors first (pink, yellow, and blue), then mixing those colors together to make all the colors in between (orange, green, and purple). To save you that stress, I’ve gathered my best tips for mixing perfect rainbow buttercream colors that go together flawlessly for decorating. When you’re mixing up a palette that has several colors in it, it can be really easy to go overboard and make some colors too dark, too bold, too warm, too cold, or otherwise just not the hues you were going for. Over the years, I’ve learned a thing or two about making my buttercream colors cohesive, aka making sure the hues go together perfectly. Then spread the whipped cream frosting on top for a finishing coat, either spreading it smooth with a knife or spatula or pulling it into soft peaks using a knife or the back of a spoon.I LOVE working with rainbow color palettes in my cake projects, whether the colors are pretty pastels or bright and bold.Using a knife, generously coat the top and sides of the cake with buttercream frosting, smoothing it with a spatula or a table knife, making sure that it is completely covered but getting rid of excess frosting.

Place the layered cake in the freezer for five minutes to let the icing set so that when you ice the exterior of the cake the layers won’t slide around.

Place the blue layer on top and repeat the process until the red layer is on top.

Spread a couple of spoonfuls of buttercream frosting over the top of the layer, smoothing it until it is even.

Place the purple layer on the serving cake platter.

Assemble the cake once the layers have completely cooled.

Beat the cream, sugar and salt at medium speed until stiff peaks form.

Adjust the consistency by adding more powdered sugar or milk.

Mix the ingredients and beat for several minutes until a smooth, creamy frosting forms.

My son, who is my toughest critic, ate it Well, now I can confidently say, yes, it’s ok! You end up using such a small amount of the vegetable juice that the flavor of the dye will probably go completely unnoticed for most people, especially when you add some frosting. I know what you’re thinking: dyeing eggs with spinach might work because it is not uncommon to combine spinach and eggs, but spinach juice in a cake?! There are lots of ingredients that would make great dyes but many of them drastically alter the taste, often introducing an unwelcome flavor to the baked good or treat. I have to admit that coloring sweets with natural dyes can get kind of tricky. I have since dabbled in cooking experiments, including using spinach to make Green Eggs and Ham and coloring buttercream frosting with natural dyes. I was intrigued with the beautiful colors that resulted from using everyday fruits, veggies and spices. Fast forward to two years ago and I completed my first intentional experiment, coloring Easter eggs with natural dyes. While making blueberry muffins I inadvertently realized that the more I stirred the batter the more the berry juice bled, making blue muffins. My first experiment with natural food dyes was when I was a child.

My husband was actually the one to challenge me to make a rainbow cake with natural food dyes. But in the back of my mind I couldn’t help but think of the negative discussion and controversy surrounding artificial food coloring. I made one last summer and my family and guests loved the bright, vibrant colors. Appreciate the natural beauty of colorful fruits and vegetables by making this Rainbow Cake with natural dyes.

Rainbow colors cake