Sandy'S Awesome Chocolate Cake - cooking recipe

Ingredients

3 cups brown sugar, packed
1 cup butter or 1 cup margarine, softened
4 eggs
2 teaspoons vanilla extract
2 2/3 cups all-purpose flour
3/4 cup baking cocoa
1 tablespoon baking soda
1/2 teaspoon salt
1 1/3 cups sour cream
1 1/3 cups boiling water
FROSTING
1/2 cup butter or 1/2 cup margarine
3 (1 ounce) unsweetened chocolate squares
3 (1 ounce) semi-sweet chocolate baking squares
5 cups confectioners' sugar
1 cup sour cream
2 teaspoons vanilla extract

Preparation

For Cake:
In a mixing bowl, cream brown sugar and butter.
Add eggs, one at a time, beating well after each addition.
Beat on high speed until light and fluffy. Blend in vanilla.
Combine flour, cocoa, baking soda and salt; add alternately with sour cream to creamed mixture. Mix on low just until combined.
Stir in water until blended.
Pour into three greased and floured 9-in. round baking pans.
Bake at 350 degrees F for 35 minutes.
Cool in pans 10 minutes; remove to wire racks to cool completely.
For Frosting:
In a medium saucepan, melt butter and chocolate over low heat. Cool several minutes.
In a mixing bowl, combine sugar, sour cream and vanilla.
Add chocolate mixture and beat until smooth.
Frost cooled cake.