I finally perfected a White Chocolate Buttercream so silky it pipes into sharp ridges and holds clean edges on a mirror-smooth cake.

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I never thought simple things like white chocolate and unsalted butter could make me rewrite my frosting rules but they did. When I first tasted this silky, slightly glossy White Chocolate Ganache Buttercream from a Sugar & Sparrow twist I had to stop, because theres a texture that begs to be piped as much as it wants to be spread.

It’s sweet but not cloying and it sits on a cake like it’s wearing its Sunday best which is why I keep calling it my favorite Cake Frosting Recipe for parties or quiet victories. I keep finding tiny details I didn’t notice before and honestly I’m hooked.

Ingredients

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White chocolate: very sweet, mostly sugar and cocoa butter, high carbs, low fiber.
Unsalted butter: rich in saturated fat, gives creaminess and body, almost no fiber.
Powdered sugar: pure sucrose, makes sweetness intense, zero fiber, empty calories.
Heavy cream: adds silkiness, increases fat and calories, small amount of protein.
Vanilla extract: aromatic, amplifies sweetness, negligible nutrition, essential flavor enhancer.
Sea salt: tiny pinch balances sweetness, supplies trace minerals, modest sodium boost.
Overall: super rich and indulgent, high in simple carbs and saturated fat, not healthy.
Texture note: fats create silky, stable frosting, sugar gives structure and sweetness.

Ingredient Quantities

8 ounces (225 g) white chocolate, chopped or chips

1 cup (227 g) unsalted butter, softened room temp

3 to 4 cups (360 to 480 g) powdered sugar, sifted

2 to 4 tablespoons heavy cream or whole milk

1 teaspoon pure vanilla extract

1/4 teaspoon fine sea salt or a pinch

How to Make this

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1. Chop the white chocolate fine, then melt it gently either in a double boiler or in the microwave in 20 second bursts, stirring between each one until smooth; avoid any water or steam or the chocolate will seize, and let the chocolate cool to warm but not hot (about slightly above room temp).

2. In a stand mixer or with a hand mixer beat the softened butter on medium-high for 2 to 3 minutes until pale and fluffy, scraping the bowl once or twice.

3. With the mixer on low, pour the warm white chocolate into the butter in a thin stream, mixing until just combined; if the chocolate is too hot and the mix looks curdled, stop, chill the bowl for 5 to 10 minutes then beat again.

4. Add the vanilla extract and the pinch of fine sea salt and mix briefly to distribute.

5. Sift in 1 cup of the powdered sugar at a time on low speed until mostly incorporated, scraping the sides as you go, until you reach about 3 cups and the texture is coming together.

6. Add 2 tablespoons of heavy cream or whole milk, increase speed to medium and beat until smooth; check consistency and sweetness, then add more powdered sugar if too thin or more cream 1 tablespoon at a time (up to 4 tablespoons total) if you want it softer or easier to pipe.

7. Beat on medium-high for 20 to 30 seconds to make it silky and smooth, but dont overbeat for minutes or it can get too aerated; scrape the bowl and check one more time for texture and taste, adjust salt or vanilla if needed.

8. If the buttercream is too soft to pipe chill it in the fridge for 10 to 20 minutes then re-whip; if it’s too firm let it sit at room temp 10 to 20 minutes and beat again or add 1 teaspoon warm cream at a time to loosen.

9. Use immediately to frost or pipe, or store airtight in the fridge up to 5 days; bring to room temperature and re-whip before using.

Equipment Needed

1. Chef’s knife and cutting board for chopping the white chocolate, dont chop too big pieces
2. Heatproof bowl for melting over a double boiler or a microwave safe bowl, keep all water away or it will seize
3. Rubber spatula for scraping the bowl and folding the mix
4. Stand mixer or hand mixer with a mixing bowl and paddle attachment to beat the butter and sugar
5. Measuring cups and spoons for butter, sugar, cream and vanilla
6. Fine mesh sieve or sifter to remove lumps from the powdered sugar
7. Glass measuring cup or small pouring jug to stream the warm chocolate in thinly
8. Piping bag and tips or an offset spatula for frosting and piping
9. Airtight container for storing leftovers in the fridge

FAQ

8 ounces (225 g) white chocolate, chopped or chips

1 cup (227 g) unsalted butter, softened room temp

3 to 4 cups (360 to 480 g) powdered sugar, sifted

2 to 4 tablespoons heavy cream or whole milk

1 teaspoon pure vanilla extract

1/4 teaspoon fine sea salt or a pinch

Q: Can I use white chocolate chips instead of chopped bars? A: Yes you can, chips melt differently because of stabilizers so melt slowly and watch texture. For the best flavor use a good quality baking bar if you can.

Q: My buttercream is grainy, what went wrong and how do I fix it? A: Grainy usually means the chocolate seized or powdered sugar wasn't fully incorporated. Warm the bowl a little and beat, or remelt the chocolate gently and add it again. Sifting the sugar helps prevent this.

Q: How do I make the frosting stiffer or softer? A: To stiffen add more sifted powdered sugar a little at a time. To loosen add 1 teaspoon of cream or milk at a time and beat until you like the texture.

Q: Will this hold up in warm weather? A: Not great. White chocolate buttercream softens above room temp. Keep cakes chilled until service, use less cream and more sugar, or use a butter-shortening mix if you need to survive heat.

Q: Can I color this buttercream? A: Yes use gel or paste food color. Liquid color can thin it so add very little. White chocolate can tint off-white so you may need more color than with plain buttercream.

Q: How long can I store leftovers? A: Fridge up to 5 days in an airtight container, or freeze up to 3 months. Before using bring to room temperature and beat until smooth.

White Chocolate Buttercream Recipe Substitutions and Variations

White chocolate: swap for white candy coating or melting wafers (use same weight, 8 oz). You can also use a dairy free white chocolate/couverture if needed, but expect a slightly different texture and sweetness.
Unsalted butter: use salted butter 1:1 but skip the added 1/4 tsp salt, or use a firm stick vegan butter 1:1 for a dairy free version (pick one meant for baking).
Powdered sugar: make your own by blitzing granulated sugar with 1 tbsp cornstarch per cup until powdery, then sift; yields about the same volume. Or use store bought icing sugar/confectioners 1:1.
Heavy cream or whole milk: substitute half and half 1:1 for similar richness, or use full fat coconut cream for a dairy free option (chill and scoop the solid part), or thin melted butter with milk (1 tbsp melted butter + enough milk to make 1/4 cup) to mimic creaminess.

Pro Tips

1. Melt the white chocolate real slow and cool it until it just feels warm to the touch, not hot. If you add it too warm the mix can go weird, so give it time or pour a teaspoon of warm cream into the chocolate to loosen it and speed cooling, then combine.

2. For extra silky texture, blitz the powdered sugar in a food processor for a few seconds then sift. It cuts down on graininess and you wont need to beat forever to get smoothness.

3. If your buttercream is too soft for piping try chilling it briefly, then whip it back up, or add a small spoon of powdered sugar to firm it without changing flavor much. If you need to salvage something broken or greasy, a tiny bit of warm cream and lots of patient beating usually brings it back.

4. White chocolate is super sweet so balance it with good salt and real vanilla, or even a tiny squeeze of lemon for brightness. Freeze extra in flat portions for up to 3 months, thaw in the fridge overnight and re-whip before using.

White Chocolate Buttercream Recipe

Recipe by Kate Sinclair

0.0 from 0 votes

I finally perfected a White Chocolate Buttercream so silky it pipes into sharp ridges and holds clean edges on a mirror-smooth cake.

Servings

servings

Calories

289

kcal

Equipment: 1. Chef’s knife and cutting board for chopping the white chocolate, dont chop too big pieces
2. Heatproof bowl for melting over a double boiler or a microwave safe bowl, keep all water away or it will seize
3. Rubber spatula for scraping the bowl and folding the mix
4. Stand mixer or hand mixer with a mixing bowl and paddle attachment to beat the butter and sugar
5. Measuring cups and spoons for butter, sugar, cream and vanilla
6. Fine mesh sieve or sifter to remove lumps from the powdered sugar
7. Glass measuring cup or small pouring jug to stream the warm chocolate in thinly
8. Piping bag and tips or an offset spatula for frosting and piping
9. Airtight container for storing leftovers in the fridge

Ingredients

8 ounces (225 g) white chocolate, chopped or chips
1 cup (227 g) unsalted butter, softened room temp
3 to 4 cups (360 to 480 g) powdered sugar, sifted
2 to 4 tablespoons heavy cream or whole milk
1 teaspoon pure vanilla extract
1/4 teaspoon fine sea salt or a pinch

Directions

Chop the white chocolate fine, then melt it gently either in a double boiler or in the microwave in 20 second bursts, stirring between each one until smooth; avoid any water or steam or the chocolate will seize, and let the chocolate cool to warm but not hot (about slightly above room temp).
In a stand mixer or with a hand mixer beat the softened butter on medium-high for 2 to 3 minutes until pale and fluffy, scraping the bowl once or twice.
With the mixer on low, pour the warm white chocolate into the butter in a thin stream, mixing until just combined; if the chocolate is too hot and the mix looks curdled, stop, chill the bowl for 5 to 10 minutes then beat again.
Add the vanilla extract and the pinch of fine sea salt and mix briefly to distribute.
Sift in 1 cup of the powdered sugar at a time on low speed until mostly incorporated, scraping the sides as you go, until you reach about 3 cups and the texture is coming together.
Add 2 tablespoons of heavy cream or whole milk, increase speed to medium and beat until smooth; check consistency and sweetness, then add more powdered sugar if too thin or more cream 1 tablespoon at a time (up to 4 tablespoons total) if you want it softer or easier to pipe.
Beat on medium-high for 20 to 30 seconds to make it silky and smooth, but dont overbeat for minutes or it can get too aerated; scrape the bowl and check one more time for texture and taste, adjust salt or vanilla if needed.
If the buttercream is too soft to pipe chill it in the fridge for 10 to 20 minutes then re-whip; if it’s too firm let it sit at room temp 10 to 20 minutes and beat again or add 1 teaspoon warm cream at a time to loosen.
Use immediately to frost or pipe, or store airtight in the fridge up to 5 days; bring to room temperature and re-whip before using.

Notes

Below you’ll find my best estimate of this recipe’s nutrition facts. Treat the numbers as a guide rather than a rule—great food should nourish both body and spirit. Figures are approximate, and the website owner assumes no liability for any inaccuracies in this recipe.