Ingredients for - Frosted Chocolate Cake

1. 4 large eggs, separated
2. 1/2 cup baking cocoa
3. 1/2 cup boiling water
4. 1/2 cup butter, softened
5. 1 cup packed brown sugar
6. 1 cup sugar, divided
7. 1 teaspoon vanilla extract
8. 2-1/2 cups all-purpose flour
9. 1 teaspoon baking soda
10. 1 teaspoon cream of tartar
11. 1/4 teaspoon salt
12. 1 cup buttermilk
13. Frosting:
14. 3/4 cup butter, melted
15. 3/4 teaspoon vanilla extract
16. 6 cups confectioners' sugar
17. 3 tablespoons whole milk
18. Dark or additional regular baking cocoa, optional

How to cook deliciously - Frosted Chocolate Cake

1 . Stage

Place egg whites in a large bowl; let stand at room temperature 30 minutes. In a small bowl, mix cocoa and boiling water until smooth; cool slightly. Line bottoms of 2 greased 9-in. round baking pans with parchment; grease parchment.

2 . Stage

Preheat oven to 375°. Cream butter, brown sugar and 3/4 cup sugar until light and fluffy, 5-7 minutes. Beat in vanilla and 1 egg yolk at a time. In another bowl, whisk together flour, baking soda, cream of tartar and salt. Add to creamed mixture alternately with buttermilk, beating after each addition. Stir in cocoa mixture.

3 . Stage

With clean beaters, beat egg whites on medium speed until soft peaks form. Gradually add remaining 1/4 cup sugar, 1 tablespoon at a time, beating on high after each addition until sugar is dissolved. Continue beating until stiff peaks form. Fold into batter. Transfer to prepared pans. Bake until a toothpick inserted in center comes out clean, 23-28 minutes.

4 . Stage

Cool in pans 10 minutes before removing to wire racks; remove parchment. Cool completely.

5 . Stage

Beat together first 4 frosting ingredients. Spread between layers and over top and sides of cake. If desired, dust top lightly with cocoa.