Cake – 1 cup unsalted butter – ¼ cup cocoa powder – 1 teaspoon kosher salt – 1 cup water – 2 cups all-purpose flour – 1 ⅔ cup granulated sugar – 1 ½ teaspoons baking soda – 2 large egg – ½ cup sour cream – 1 teaspoon pure vanilla extract Glaze – 4 ounces bittersweet chocolate finely chopped (I used half milk half semi-sweet chocolate) – 2 tablespoons corn syrup or honey or agave – ⅓ cup heavy cream – 2 tablespoons granulated sugar
In a small saucepan, combine the butter, cocoa powder, salt, and water and cook over medium heat, whisking constantly, just until melted and combined. Remove from the heat and set aside.
Combined the flour, sugar, and baking soda in a mixing bowl. Add half of the melted butter/chocolate mixture and mix until blended. Mix in the remaining butter mixture. Add the eggs. Mix in the sour cream and vanilla until smooth.