3 buttermilk cake contessa Recipes

unsalted butter, at room temperature, granulated sugar, divided, extra-large eggs, at room temperature, grated orange zest (6 oranges), all-purpose flour, baking powder, baking soda, kosher salt, freshly squeezed orange juice, divided, buttermilk, at room temperature, pure vanilla extract

butter, for greasing the pans, all-purpose flour, plus more for pans, sugar, good cocoa powder, baking soda, baking powder, kosher salt, buttermilk , shaken, vegetable oil, extra-large eggs, at room temperature, pure vanilla extract, freshly brewed hot coffee, good semisweet chocolate (recommended -- callebaut), unsalted butter, at room temperature, extra-large egg yolk, at room temperature, pure vanilla extract, sugar, instant coffee powder