Ingredients
Equipment
Method
- In a large saucepan, bring the butter, water, and cocoa to a boil.
- Remove the saucepan from the heat.
- Combine the flour, sugar, baking soda, and salt in a separate bowl. Add this dry mixture to the cocoa mixture and stir.
- Stir in the sour cream until the batter is smooth.
- Pour the batter into a greased 15x10x1-inch baking pan.
- Bake at 350 degrees Fahrenheit for 20 to 25 minutes, or until a toothpick inserted in the center comes out clean.
- While the cake bakes, prepare the icing. In a small saucepan, melt the butter. Add the milk and cocoa. Bring this mixture to a boil.
- Remove the icing mixture from the heat. Whisk in the confectioners' sugar and vanilla until the frosting is smooth.
- Pour the warm icing over the warm cake.
- Cool the cake completely on a wire rack before serving.
Nutrition
Notes
For make-ahead preparation, you can bake the cake layer and store it tightly wrapped at room temperature for up to two days. You can also make the frosting and store it in the refrigerator for up to three days; let it soften slightly before warming it gently on the stovetop to reach pouring consistency.
