Gluten-Free Ombré Cake

Gluten-Free Ombré Cake

4.0(102)

Wow your friends with this stunning gluten-free ombré cake! With berries and beets used as natural alternatives to food coloring, this ombré cake tastes as vibrant as it looks!

Cook Time
1 hr 30 min
Total Time
2 hr
Yield
10 servings

How to Make It

1. Step
Make the cakes: Preheat the oven to 350°F (180°C). Grease 3 8-inch (20 cm) round cake pans with nonstick spray and line with parchment paper.
2. Step
Add the beets, raspberries, and milk to a blender. Blend until mostly smooth. Strain the mixture through a fine-mesh sieve into a medium bowl, pressing the solids with a spatula to extract as much liquid as possible. You should have about 2 cups (480 ml) total. Discard the solids. Reserve ½ cup (120 ml) of beet-milk mixture for the frosting. Set the remaining beet-milk mixture aside.
3. Step
Add the flour, baking powder, salt, sugar, and butter to a large bowl. Mix on medium speed with an electric hand mixer for 2–3 minutes, until the mixture is sandy in texture.
4. Step
Add the egg whites and vanilla and mix on medium speed until combined, scraping down the sides of the bowl as needed.
5. Step
Add ⅔ cup (160 ml) of the beet-milk mixture to the batter and beat to combine. Measure 2 cups (230 G) of batter and transfer to one of the prepared pans. Spread in an even layer.
6. Step
Add ⅓ cup (70 ml) more of the beet-milk mixture to the remaining batter and beat to combine. Measure 2 cups of batter and transfer to another prepared pan. Spread in an even layer.
7. Step
Add ½ cup (120 ml) more of the beet-milk mixture to remaining batter and beat to combine, then transfer to the remaining prepared pan and spread in an even layer.
8. Step
Bake the cakes for 30–35 minutes, until a toothpick inserted in the center comes out clean and the cake pulls away from the sides of the pan. Transfer the cakes to a wire rack to cool for 5–10 minutes, until safe to handle. Turn the cakes out of the pans and let cool completely on the wire rack. Note: The darkest cake may need to bake for up to 5 minutes longer than the other cakes, as it contains the most liquid.
9. Step
While the cakes cool, make the frosting: In a small saucepan, whisk together the reserved ½ cup (120 ml) beet-milk mixture and the flour. Cook over medium-low heat for 2–3 minutes, whisking continuously, until the mixture thickens. Remove from the heat and transfer to a small bowl. Cover tightly with plastic wrap, pressing it directly against the surface so a skin doesn’t form, then transfer to the refrigerator and let cool completely.
10. Step
In a large bowl, use an electric hand mixer to cream together the butter, vanilla, and salt on high speed until smooth. Sift in the powdered sugar and beat on low speed until incorporated and the frosting is smooth.
11. Step
Add 2 tablespoons the beet-flour mixture and beat to combine. Transfer ½ cup (55 G) of frosting to each of 2 small bowls.
12. Step
Add 2 tablespoons of the beet-flour mixture to one of the small bowls of frosting and mix to combine.
13. Step
Add ¼ cup (55 G) of the beet-flour mixture to the other small bowl of frosting and mix to combine.
14. Step
Transfer the two darker frostings to piping bags fitted with ½-inch (1 ¼ cm) round tips.
15. Step
Assemble the cake: Place the cardboard round on the cake turntable.
16. Step
Trim off the domed tops of the cakes.
17. Step
Spread a dab of frosting in the center of the cardboard round. Center the darkest cake on the cardboard round. Using an offset spatula, spread about ½ cup (55 G) of the lightest frosting over the top of the cake in an even layer about ½ inch (1 ¼ cm) thick. Spread ¼ cup (80 G) raspberry jam over the frosting. Place the next lightest cake layer on top and repeat frosting and filling with another ½ cup (55 G) of the same frosting and the remaining ¼ cup (80 G) jam. Top with the lightest cake layer.
18. Step
Dollop 1 cup (115 G) of the lightest frosting on top of the cake. Using the offset spatula, spread the frosting in an even layer across the top, starting from the center and working toward the outer edge. Cover the sides of the cake with frosting, working from top to bottom down the sides. Remove and reserve any excess frosting. Holding a bench scraper against the side of the cake, slowly spin the turntable to help spread the frosting into a thin “naked” layer. Remove excess frosting from the bench scraper as necessary. Refrigerate the cake for 20 minutes, until the frosting is set.
19. Step
To create the ombre effect, heap the remaining light frosting on top of the cake. Smooth over the top and push just over the sides, about 1 inch (2 ½ cm) down. Pipe the medium frosting along the middle 2 inches (5 cm) of the cake. Pipe the darkest frosting along the bottom 2 inches (5 cm) of the cake. Holding a bench scraper against the side of the cake, slowly spin the turntable to help smooth the frosting, wiping away the excess. Smooth the top and sides.
20. Step
Heap the raspberries on top of the cake.
21. Step
Slice and serve.
22. Step
Enjoy!

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