I can’t get over how this violet ombré rosette cake looks like it fluttered straight out of a sugar-spun garden. With delicate butterflies and dreamy purple swirls, it’s the kind of showstopper that makes everyone pause before the first slice.

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I’m obsessed with this Violet Ombré Rosette Cake because it looks dramatic without feeling stiff or fussy. Those swoops of purple buttercream?

Ridiculous in the best way. I love how the rosettes move from soft lavender to deep violet, like the whole cake is showing off.

And the butterflies make it feel a little extra, which I fully support. The vanilla comes through first, then that rich buttercream hits and keeps me going back for another forkful.

But honestly, it’s the color that gets me. Bold, pretty, slightly over the top.

Exactly my kind of cake for celebrations.

Ingredients

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All purpose flour gives the cake structure without making it feel heavy.
Baking powder helps it rise, so you get soft, pretty layers.
Fine salt keeps all that sweetness from tasting flat.
Soft butter brings richness and that classic birthday cake vibe.
Granulated sugar makes it sweet, tender, and lightly golden.
Eggs hold everything together and add a little richness.
Vanilla makes the whole cake smell cozy and bakery-fresh.
Whole milk keeps the crumb soft, moist, and easy to love.
Sour cream adds tang and helps the cake stay tender.
Violet gel colors make that dreamy ombré look without watering things down.
Buttercream butter makes the rosettes creamy, smooth, and pipeable.
Confectioners sugar builds fluffy frosting that actually holds its shape.
Heavy cream loosens the frosting so it pipes like a dream.
Plus, dragees and sanding sugar add sparkle without trying too hard.
Basically, butterflies and dust make it feel magical, not fussy.

Ingredient Quantities

2 2/3 cups (340 g) all purpose flour

2 1/2 teaspoons baking powder

1/2 teaspoon fine salt

1 cup (227 g) unsalted butter, softened

1 3/4 cups (350 g) granulated sugar

4 large eggs, room temperature

1 tablespoon pure vanilla extract

1 cup (240 ml) whole milk, room temperature

1/2 cup (120 g) sour cream, room temperature

Violet and purple gel food coloring, several shades (concentrated gel colors for ombré)

1 1/2 cups (340 g) unsalted butter, softened, for buttercream

6 to 7 cups (720 to 840 g) confectioners sugar, sifted

2 teaspoons pure vanilla extract for buttercream

1/4 cup (60 ml) heavy cream, plus more as needed to reach piping consistency

Pinch of fine salt for buttercream

Silver or pearl edible dragees, optional for accent

Edible wafer paper or ready made wafer butterflies, or white fondant to cut butterfly shapes

Edible petal dust or luster dust in violet and lavender, for shading butterflies and rosettes

Clear piping gel or edible glue, to attach butterflies

Granulated or sanding sugar in pale violet, optional for sparkle

How to Make this

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1. Preheat oven to 350°F (175°C). Grease and line three 8 inch cake pans with parchment; set aside.

2. Whisk together 2 2/3 cups (340 g) all purpose flour, 2 1/2 teaspoons baking powder, and 1/2 teaspoon fine salt in a bowl.

3. In a large bowl, cream 1 cup (227 g) softened unsalted butter with 1 3/4 cups (350 g) granulated sugar until light and fluffy, about 3 to 5 minutes. Add 4 large eggs one at a time, mixing well after each, then beat in 1 tablespoon pure vanilla extract.

4. With mixer on low, alternately add the dry mixture and 1 cup (240 ml) whole milk, beginning and ending with the dry ingredients. Fold in 1/2 cup (120 g) sour cream until batter is smooth.

5. Divide batter into three or four portions depending on the number of ombré shades you want. Tint each portion with violet and purple gel food coloring to create a gradient from light lavender to deep violet. Pour into prepared pans and smooth tops.

6. Bake 22 to 28 minutes or until a toothpick inserted in the centers comes out clean. Cool in pans 10 minutes, then invert onto wire racks to cool completely.

7. Make buttercream by beating 1 1/2 cups (340 g) softened unsalted butter until creamy, then gradually add 6 to 7 cups (720 to 840 g) sifted confectioners sugar on low. Add 2 teaspoons pure vanilla extract, 1/4 cup (60 ml) heavy cream, and a pinch of fine salt; increase speed and beat until light and pipeable. Adjust cream or sugar to reach piping consistency.

8. Tint portions of buttercream to match your cake ombré shades as needed. Level cake layers, place the darkest layer on the cake board, spread a thin crumb coat or a layer of buttercream between layers, stack and chill 15 minutes. Apply a smooth crumb coat all over and chill 20 minutes more.

9. Fit a piping bag with an open star tip and fill with the lightest to the darkest purple buttercream in separate bags or a multi color bag for rosettes. Pipe rosettes all over the chilled cake by starting in the center of each rosette and spiraling outward. Add silver or pearl edible dragees and sprinkle pale violet sanding sugar if desired.

10. Prepare butterflies from edible wafer paper or cut white fondant into butterfly shapes, shade with edible petal dust or luster dust in violet and lavender, and attach to the cake with clear piping gel or edible glue. Chill briefly to set, then bring to room temperature before serving.

Equipment Needed

1. Oven (preheat to 350°F 175°C)

2. Three 8 inch cake pans plus parchment paper and nonstick spray or butter for greasing

3. Electric stand mixer or hand mixer with paddle and whisk attachments

4. Mixing bowls (various sizes)

5. Dry and liquid measuring cups and measuring spoons

6. Rubber spatula and a metal or silicone spoon for folding

7. Whisk

8. Wire cooling racks

9. Serrated knife or cake leveler and cake board or serving plate

10. Piping bags and an open star piping tip, plus an offset spatula for crumb coat and smoothing

FAQ

Q: Can I make the cake layers ahead of time and how should I store them?

A: Yes. Bake, cool completely, wrap each layer tightly in plastic wrap, then in foil, and refrigerate up to 48 hours or freeze up to 3 months. Thaw in the refrigerator overnight before trimming and assembling.

Q: How do I achieve a smooth violet ombré without overmixing the batter?

A: Divide batter into separate bowls, add small amounts of concentrated gel color to each to create graduated shades. Fold color in gently until uniform. Avoid vigorous mixing once flour is added to keep the crumb tender.

Q: What is the best way to get firm buttercream that still pipes beautifully?

A: Use softened but not melted butter and sifted confectioners sugar. Add heavy cream a tablespoon at a time to reach piping consistency. Chill briefly if too soft, and beat on low for a short time to restore smoothness before piping.

Q: How do I pipe the rosettes so they look neat and consistent?

A: Use a large open star tip and start at the center of each rosette, rotating the piping bag in a continuous spiral outward. Keep even pressure and distance from the cake surface to maintain uniform height and shape.

Q: How do I make and attach delicate wafer or fondant butterflies?

A: Cut shapes from wafer paper or roll and cut fondant thinly. Shade with petal or luster dust for depth. Attach with a dab of clear piping gel or edible glue and hold briefly until secure. For lift, bend wings gently and glue only the body to the cake.

Q: My cakes domed or sank in the center, how can I prevent or fix that?

A: To prevent doming, bake at proper temperature, avoid overfilling pans, and level batter evenly. If domed, trim flat with a serrated knife after cooling. If a layer sank, fill the depression with a thin layer of buttercream before stacking to create a stable surface.

Violet Ombré Rosette Cake Recipe Substitutions and Variations

All purpose flour (2 2/3 cups / 340 g): substitute cake flour for a lighter crumb; for gluten free use a 1-to-1 gluten free baking blend, weighing equal to 340 g and add 1 teaspoon xanthan gum if blend lacks it.
Unsalted butter (cake and buttercream): substitute equal weights of European style butter for richer flavor; for dairy free use plant based stick margarine formulated for baking, or refined coconut oil measured by weight (may slightly change texture).
Sour cream (1/2 cup / 120 g): substitute full fat Greek yogurt 1:1 for similar tang and moisture; or use crème fraîche 1:1 for richer flavor.
Whole milk (1 cup / 240 ml): substitute buttermilk for a touch more tang and tender crumb (use 1 cup buttermilk and reduce sour cream slightly), or use unsweetened almond milk 1:1 for dairy free (combine with 1 teaspoon apple cider vinegar if you want slight acidity).

Pro Tips

1) Weigh your ingredients and make sure eggs, milk and sour cream are truly at room temperature. Cold ingredients make batter seize and give denser cakes, while room temp items help everything emulsify for a lighter crumb.

2) Use gel color sparingly and build shades slowly. A little concentrated purple goes a long way; mix thoroughly and let the color rest for a few minutes before deciding if you need more. For consistent ombré layers, tint all batters on the same scale (for example, add 1 drop, then 2 drops, then 4 drops).

3) Level and chill between stages. Trim domes while warm or use a serrated knife after they cool; apply a thin filling layer, then a quick chill before the crumb coat. Cold layers and a chilled crumb coat make smoothing and piping much easier and cleaner.

4) For tidy rosettes and butterflies, use a well-filled piping bag and pipe onto a chilled cake so the shapes hold. Dust wafer or fondant butterflies gently with petal dust for depth, attach with a tiny dab of piping gel, and let them set at cool room temperature before transporting.

Violet Ombré Rosette Cake Recipe

Recipe by Samantha Dalling

0.0 from 0 votes

Servings

servings

Calories

891

kcal

Equipment: 1. Oven (preheat to 350°F 175°C)