The Brooklyn Blackout Cake.

Bahan-bahan (8 porsi)

• 1 stick (8 tablespoons) unsalted butter (softened at room temperature, 1 stick)
• 1/4 cup canola oil
• 1 cup sugar (use 1 1/2 cups for a sweater cake)
• 3 eggs (at room temperature)
• 2 teaspoons pure vanilla extract
• 1 teaspoon instant coffee (optional)
• 3/4 cup unsweetened cocoa powder
• 1 teaspoon baking powder
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 2 1/4 cups cake flour (or 2 cups flour + 1/4 cornstarch)
• 1 cup buttermilk
• 2 1/2 cups water plus 1/2 cup water (separated)
• 2 1/2 cups granulated sugar
• 1 tablespoon honey
• 1 cup unsweetened cocoa powder
• 2/3 cup cornstarch
• 6 tablespoons unsalted butter, cold and cut into 1-inch cubes
• 1/2 teaspoon pure vanilla extract
• 1 stick (8 tablespoons) salted butter (softened to room temperature)
• 1 cup powdered sugar
• 1/4 cup unsweetened cocoa powder
• 1 teaspoon vanilla extract
• 1 -2 tablespoons heavy whipping cream