Cream-Cheese Mocha Cake

Hot coffee dissolves into cocoa powder to create the deep, bittersweet mocha base of this two-layer cake. Sour cream keeps the crumb tender while brown and white sugar together give it a more complex sweetness than either one alone. Folded-in stiffly beaten egg whites lighten the batter so the finished cake is rich without being dense.

The coffee-cocoa step is worth getting right. Stir constantly while you add the hot coffee to the cocoa so it forms a smooth paste, not a lumpy mess. Let it cool completely before mixing it into the batter, or it will melt the butter and throw off the whole texture.

Dissolving baking soda directly in the sour cream is an old baker’s trick. It starts reacting immediately, so work quickly once you combine them. Alternate adding the sour cream mixture and flour to the batter, beating well after each addition to build structure without overworking the gluten.

The tangy cream cheese frosting is a smart pairing here. It cuts through the rich mocha layers instead of piling on more sweetness.

Kitchen Tips

• Separate eggs while cold, then let whites come to room temperature before beating. Warm whites whip to greater volume.
• Don’t skip folding the egg whites gently. Stirring them in deflates the air you just beat into them.
• Use a piped rosette on each slice for a bakery-style finish, as the recipe suggests.

Variations

• Add a tablespoon of instant espresso to the frosting for a mocha-on-mocha effect.
• Replace sour cream with full-fat Greek yogurt for a slightly tangier crumb.