White Chocolate Raspberry Cake with Buttercream

Vanilla cake. Raspberry. White chocolate. That’s the layering that happens. Four layers stacked, and you’re not worried because the buttercream holds everything exactly where it needs to be. Eighty minutes of prep, fifteen to bake — but mostly you’re doing the fussy stuff while the cakes cool, tempering chocolate, piping icicles, watching it all come together into something that looks like it took all day.

Why You’ll Love This White Chocolate Raspberry Cake

Sounds complicated. Isn’t — just takes patience, not skill. The mascarpone cuts through sweetness. Raspberries stay tart. Everything balances. You can do the filling and buttercream a day ahead. Assembly the morning of. Those white chocolate shards don’t actually require tempering expertise — they just need you to follow along, and they’ll work. Cold straight from the fridge, or soften it on the counter for forty minutes. Works both ways, tastes different each time.

What You Need for Layered Cake with Mascarpone

Two vanilla cakes, 22 centimeters. Store-bought works. Homemade tastes better. Same difference for the finishing.

Egg yolks — three. Not the whites. The yolks carry the buttercream.

Water, sugar, corn syrup. Heat them to 118 degrees Celsius. This is the only temperature that matters in this whole recipe.

White chocolate. Two separate amounts — 140 grams melted into the buttercream, 190 grams for the icicles. Don’t mix them up. Different jobs.

Vanilla extract. Just the pure kind. The imitation stuff tastes like plastic here.

Butter. Unsalted. 275 milliliters, softened to room temperature. Cold butter won’t beat in. Warm butter breaks apart. Room temp is the only option.

Raspberries. Fresh or frozen. Frozen works just as well. Same result.

Mascarpone. One 300-gram container. Not ricotta. Not cream cheese. Mascarpone is thicker, richer, does a different thing.

Lemon juice. Forty milliliters. Fresh. The acid keeps everything from sliding into pure sugar.

Parchment paper for the icicles. Something to draw on, something to pipe onto, something to peel away after.

How to Make Four Layer Vanilla Cake with White Chocolate Buttercream

Start with the raspberry filling because it needs to chill. Toss 280 milliliters of raspberries — fresh or frozen, doesn’t matter — with sugar and lemon juice. If they’re frozen, let them sit for fifteen minutes. They’ll release juice. Then blend the mascarpone in with an electric mixer. Keep going until it stops looking lumpy and turns creamy. Put it in the fridge while you do everything else.

Level the cake tops. Cut each one horizontally into two layers. You end up with four layers total. This is mechanical. A serrated knife works. A cake leveler works better but you probably don’t have one. Just make the cuts even enough.

The buttercream is where the recipe gets real. Egg yolks go in a large bowl. Water, sugar, and corn syrup go into a saucepan. Bring it to a boil, then watch the temperature climb. When it hits 118 degrees Celsius — that’s 245 Fahrenheit — stop. Don’t wait. Don’t keep heating.

Pour that hot syrup slowly over the yolks while your mixer runs on medium. This is the part where people get nervous. The syrup is molten. The eggs are raw. The mixer does the work — just pour slowly, not all at once, and you’re safe. Beat until the whole thing cools completely. This takes maybe twenty minutes. The mixture goes pale, thick, almost mousse-like. That’s when you know.

Fold in the melted white chocolate. Then the vanilla. Then the butter cubes, gradually, beating until it looks like frosting. Scrape the bowl. Make sure nothing’s hiding at the bottom. This buttercream is glossy, spreadable, holds a shape.

How to Get White Chocolate Shards and Icy Details Right

Tempering white chocolate is easier than people say. Chop 190 grams into pieces. Melt two-thirds of it — double boiler, or microwave in thirty-second bursts, stirring. Temperature doesn’t have to be exact. Just melted. Then add the remaining chocolate. Stir it in. This brings the temperature down and stabilizes the cocoa butter. If it’s too thick, reheat gently for a few seconds. That’s tempering. No thermometer needed.

Draw three rectangles on parchment paper. Forty-four by fifteen centimeters each. These are your guides. Use a piping bag with a fine round tip — two millimeters, roughly. Pipe vertical hatch marks inside each rectangle. Tight lines. Close together. They should look like something frozen, fractured, sharp. Not a pattern. Not perfect. Just icy.

Chill for twelve minutes or leave at room temperature until hardened. Room temp takes about an hour. Cold is faster but both work.

Peel the chocolate lace away from the parchment carefully. It breaks easily. Work in pieces — eight-centimeter strips. Press the flat side against the frosted cake sides. Work your way around, building up layers of shards until it looks jagged and frosted. The pieces don’t need to match or line up. The whole point is that they look random.

White Chocolate Mascarpone Cake Tips and Common Mistakes

Softened butter matters more than you think. If it’s too cold, the buttercream stays grainy. If it’s too warm, it collapses. Room temperature. Actually room temperature, not close enough.

The candy thermometer reads 118 degrees Celsius. Not 120. Not 115. It’s a narrow window. Get there and stop.

Mascarpone separates if you overmix it. Blend just until smooth. Stop. The second you start seeing liquid, you’ve gone too far.

The four cake layers should be even. Uneven layers make the whole thing lean. Take your time cutting them horizontal.

The icicles break. They’re supposed to be fragile. If you’re terrified you’ll destroy them, you’ve already destroyed them mentally. Just peel and press. Some will crack. Use the pieces anyway.

Serve it cold or at room temperature. Cold, the buttercream is firm and clean. Forty minutes out of the fridge, it’s softer, more mousse-like. Both taste better than the other depending on the day.

White Chocolate Raspberry Cake with Buttercream

By Emma

Prep:

80 min

Cook:

15 min

Total:

1h 35min

Servings:

12 servings

Ingredients

• 2 vanilla cakes 22 cm (8 1/2 in)
• Buttercream
• 3 egg yolks
• 80 ml (1/3 cup) water
• 130 ml (1/2 cup plus 1 tbsp) sugar
• 20 ml (1 1/2 tbsp) light corn syrup
• 140 g (5 oz) white chocolate, melted
• 3 ml (1/2 tsp) pure vanilla extract
• 275 ml (1 1/4 cups) unsalted butter, softened and cubed
• Raspberry Filling
• 280 ml (1 1/4 cups) fresh or frozen raspberries
• 90 ml (3/8 cup) sugar
• 40 ml (2 2/3 tbsp) fresh lemon juice
• 1 container 300 g (10 1/2 oz) mascarpone cheese
• White Chocolate Icicles
• 190 g (7 oz) white chocolate, chopped

Method

1. Raspberry Filling
2. 1 Toss raspberries, sugar, and lemon juice in a bowl. If frozen, let sit 15 minutes to thaw and release juice.
3. 2 Blend mascarpone into raspberry mixture using electric mixer till creamy and homogenous. Chill.
4. Cake Prep
5. 3 Remove cake domes to level tops. Cut each cake horizontally into two even layers. Four layers total.
6. Buttercream
7. 4 Place egg yolks in large bowl, set aside.
8. 5 Bring water, sugar, and corn syrup to boil in saucepan. Heat till candy thermometer reads 118°C (245°F).
9. 6 Slowly drizzle hot syrup over yolks, beating continuously with electric mixer on medium speed. Avoid hitting whisks directly with syrup. Beat until mixture cools completely (about 20 minutes).
10. 7 Fold melted white chocolate and vanilla into cooled yolk mixture.
11. 8 Add butter cubes gradually, beating until very creamy. Scrape bowl bottom occasionally.
12. Assembly
13. 9 Spread raspberry filling evenly on three cake layers. Stack layers, finish with one unfilled. Cover entire cake with buttercream. Smooth sides and top carefully.
14. White Chocolate Icicles
15. 10 Cut three sheets of parchment roughly 44 x 31 cm (17 1/4 x 12 in). On reverse side, draw a rectangle 44 x 15 cm (17 1/4 x 6 in), about 5 cm (2 in) taller than frosted cake height.
16. 11 Melt two-thirds of white chocolate in double boiler or microwave, stirring often. Add remaining chocolate, mix to temper. If necessary, gently reheat briefly.
17. 12 Using a piping bag fitted with a fine round tip (~2 mm), pipe tight vertical hatch marks inside drawn rectangle to mimic icy shreds.
18. 13 Chill parchment for 12 minutes or leave at room temp until hardened (~1 hr).
19. 14 Using small spatula, carefully peel chocolate lace in ~8 cm (3 in) strips. Press flat side to cake sides vertically, applying pieces gradually all around.
20. 15 Refrigerate assembled cake. Remove from fridge 40 minutes before serving to soften buttercream slightly.

Nutritional information

Calories

450

Protein

5g

Carbs

40g

Fat

30g

Print Recipe Save to Pinterest

Frequently Asked Questions About White Chocolate Buttercream Frosting Recipe

Can I make the buttercream the day before? Yeah. Make it, cover it, refrigerate it. Bring it back to room temperature the next day and re-whip it for a minute. Loosens it back up.

What if my syrup doesn’t hit 118 degrees? It won’t set right. The temperature’s doing something chemical to the eggs. Can’t skip it. A candy thermometer is the only way to know.

Do I actually need mascarpone or can I use cream cheese? Mascarpone’s different. Thicker. Richer. Cream cheese will work but it tastes sharp, watery. Not the same cake. Just use mascarpone.

How long does the whole thing take? Eighty minutes prep. Fifteen minutes for the cake part if you’re starting from scratch with vanilla cakes already baked. But most of that’s tempering chocolate, piping icicles, letting things chill. You’re not actually cooking the whole time.

Can I use frozen raspberries? They’re actually better here because they release more juice. Thaw them in the sugar mixture for fifteen minutes and that’s it.

What if the white chocolate icicles won’t stick? The buttercream needs to be set but not rock hard. Should give a little when you press. If they’re not holding, let the frosted cake sit in the fridge for thirty minutes and try again.