Mocha Cake with Chocolate Butter Creme

An elegant two-layer cake that brings together coffee and chocolate in a silky buttercream frosted over a light, airy sponge soaked in orange syrup. This is French-style patisserie baking, not a quick box mix.

The sponge is built on separated eggs. Yolks beaten with sugar for a full five minutes until thick and pale, flour folded in, then stiffly whipped whites with extra sugar folded gently on top. Triple-sifting the flour with salt and baking powder ensures the lightest possible crumb. Once baked, the layers get saturated with a hot orange juice and sugar syrup that keeps them moist for days.

The buttercream is where the mocha comes in. A cooked sugar syrup with cream of tartar gets streamed into beaten egg yolks, then butter and shortening are beaten in until smooth, and finally melted sweet chocolate and instant coffee get folded through. The result is a glossy, stable frosting with deep coffee-chocolate flavor.

Pro Tips

• Fold the egg whites in gently. Aggressive stirring deflates them and you lose all the lift in the cake.
• The sugar syrup for the buttercream must be hot but not boiling when poured over the yolks. Too hot scrambles them.
• Beat the buttercream until completely smooth before adding the melted chocolate. Lumps in the base won’t smooth out after.
• Soak the cakes while still warm so they absorb the orange syrup more evenly.

Variations

• Add a tablespoon of dark rum to the orange soaking syrup for a boozier, more complex cake.
• Use bittersweet chocolate instead of sweet for a more intense mocha flavor.
• Garnish with chocolate-covered espresso beans or a dusting of cocoa powder.