Barefoot Contessa | Beatty's Chocolate Cake | Recipes

Ingredients

• 6 ounces good semisweet chocolate, such as Valrhona
• ½ pound (2 sticks) unsalted butter, at room temperature
• 1 extra-large egg yolk, at room temperature
• 1 teaspoon pure vanilla extract
• 1¼ cups sifted confectioners’ sugar
• 1 tablespoon instant coffee granules, such as Nescafe