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All-Purpose Flour: The structure of the cake. Unlike confetti cake where you can use either, do not use cake flour here—when combined with ultra-light cocoa powder, cake flour is too fine for this cake.
Unsweetened Natural Cocoa Powder: Do not use dutch-process cocoa powder. If you’re interested, see dutch-process vs natural cocoa powder for an in-depth explanation.
Baking Soda & Baking Powder: Remember the differences in baking soda vs baking powder? We use both here for lift.
Salt: Salt balances the flavor.
Espresso Powder: Espresso powder is optional, but I recommend its addition because it enhances the chocolate flavor. The chocolate cake will not taste like coffee, I promise. I use espresso powder in my chocolate zucchini cake, Guinness cake, chocolate raspberry cake, and marble loaf cake too!
Oil: Don’t use butter in this cake batter. Cocoa powder is a particularly drying ingredient, so this cake needs oil for suitable moisture. Same goes for my chocolate cake roll recipe, too.
Eggs: Use 2 room temperature eggs. To speed up the gently warming, place refrigerated eggs in a cup of warm water for 10 minutes. Did you know what the temperature of your ingredients has a direct correlation to the success of your recipes? Unless otherwise noted, use room temperature ingredients.
Buttermilk: This chocolate cake requires the moisture and acidity from buttermilk. Lately I’ve been using a mix of sour cream and buttermilk, as well as reducing the hot liquid. You can read more about this next and see my dark chocolate mousse cake, tuxedo cake, black forest cake, German chocolate cake, and chocolate peanut butter cake recipes.
Vanilla Extract: Vanilla extract adds flavor.
Hot Coffee or Hot Water: Hot liquid enhances the cocoa powder’s flavor. It also encourages it to bloom and dissolve appropriately. You’ll notice I don’t use hot liquid in my chocolate cupcakes recipe. That’s because there isn’t the same volume of dry ingredients. With this amount of cake batter, we need a hot liquid to break up the cocoa powder lumps resting in all that flour. If you don’t drink coffee, you can use hot water. For deeper and darker flavor, though, use coffee. (Decaf coffee works!)
