Ingredients
For the Cake:
2 cups all-purpose flour
2 cups sugar
1/2 teaspoon baking soda
1/2 teaspoon salt
2 large eggs plus 2 yolks
2 teaspoons vanilla extract
1/4 cup sour cream
8 ounces semisweet chocolate, chopped
4 tablespoons unsalted butter
3/4 cup vegetable oil
3/4 cup water
1/2 cup Dutch-processed cocoa powder
For the Chocolate Icing:
8 tablespoons (1 stick) unsalted butter
1/2 cup heavy cream
1/2 cup Dutch-processed cocoa powder
1 tablespoon light corn syrup
3 cups confectioners’ sugar
1 tablespoon vanilla extract
1 cup toasted pecans, chopped