Ingredients

The following ingredients have 12 Servings
  • 2 ounces (57 grams) semisweet chocolate
  • 1/4 cup heavy cream
  • 4 ounces (113 grams) bittersweet chocolate, finely chopped
  • 1/3 cup (28 grams) dark cocoa powder
  • 1/2 cup boiling water
  • 3/4 cup (95 grams) all-purpose flour
  • 1/2 cup (100 grams) granulated sugar
  • 1/4 cup (50 grams) packed light brown sugar
  • 1/2 teaspoon salt
  • 1/2 teaspoon baking soda
  • 1/2 cup (113 grams) sour cream or plain yogurt, at room temperature
  • 1/4 cup vegetable oil
  • 2 large eggs plus one egg yolk, at room temperature
  • 2 teaspoons white vinegar
  • 1 teaspoon vanilla extract
  • 8 ounces (227 grams) bittersweet chocolate, melted and cooled
  • 3 cups (375 grams) powdered sugar, sifted
  • 1/4 cup (21 grams) dark cocoa powder, sifted
  • 8 ounces (227 grams) unsalted butter, at room temperature
  • 1/4 teaspoon fine salt
  • 2 teaspoons pure vanilla extract
  • 2 tablespoons heavy cream

Instruction