4 ina buttercream frosting Recipes

bittersweet chocolate, semisweet chocolate, egg whites (4-5 extra-large eggs), at room temperature, granulated sugar, cream of tartar, kosher salt, unsalted butter, at room temperature, pure vanilla extract, instant espresso powder , dissolved in 1 1/2 tsp water, dark rum , optional

all-purpose flour, good cocoa powder, baking soda, kosher salt, unsalted butter, at room temperature, granulated sugar, light brown sugar , packed, extra-large eggs, at room temperature, pure vanilla extract, buttermilk, at room temperature, sour cream, at room temperature, brewed coffee, chocolate buttercream frosting , recipe follows, bittersweet chocolate, semisweet chocolate, egg whites (4-5 extra-large eggs), at room temperature, granulated sugar, cream of tartar, kosher salt, unsalted butter, at room temperature, pure vanilla extract, instant espresso powder , dissolved in 1 1/2 tsp water, dark rum , optional

all-purpose flour, good cocoa powder, baking soda, salt, unsalted butter, at room temperature, granulated sugar, light brown sugar , packed, extra-large eggs, at room temperature, pure vanilla extract, buttermilk, at room temperature, sour cream, at room temperature, brewed coffee, semisweet chocolate chips, heavy cream, light corn syrup, pure vanilla extract, unsalted butter, at room temperature, m & s candy for decorating