Basic Chocolate Cake

This is the chocolate cake recipe you reach for when you want something dependable. Melted unsweetened chocolate (not cocoa powder) gives it a deep, honest chocolate flavor, buttermilk keeps it moist and tangy, and cake flour ensures a fine, tender crumb. Two 9-inch layers ready for whatever frosting you like.

Using unsweetened baking chocolate squares instead of cocoa powder makes a noticeable difference. The cocoa butter in the chocolate adds richness and creates a more fudgy, complex flavor than dry cocoa can achieve on its own. Melting it in a double boiler prevents scorching.

The batter uses both baking powder and baking soda. Baking soda reacts with the acidic buttermilk for immediate lift, while baking powder provides a slower, secondary rise in the oven. Together they give the cake a balanced structure that’s light without being fragile.

Pro Tips

• Melt the chocolate over low heat in a double boiler and let it cool slightly before adding to the batter. Hot chocolate can start cooking the eggs the moment they meet.
• Alternate adding the flour mixture and buttermilk, starting and ending with flour. This keeps the batter emulsified and prevents curdling.
• The water at the end thins the batter to the right consistency. Don’t be alarmed that it looks thin going into the pans; that liquid produces a moist, not dense, cake.
• Cool 10 minutes in the pans, then unmold. Too long in the pan and the bottom steams, making it gummy.

Variations

• Mexican chocolate cake: Add a teaspoon of cinnamon and a pinch of cayenne to the flour mixture for a warmly spiced, slightly smoky version.
• Mocha layer cake: Replace the water with strong brewed coffee. It intensifies the chocolate flavor without making it taste like coffee.