Cake
1 cup butter
1/4 cup cocoa
1 cup water
1/2 cup buttermilk
2 large eggs
1 teaspoon baking soda
1 teaspoon vanilla extract
2 cups sugar
2 cups all-purpose flour
1/2 teaspoon salt

Chocolate Ganache
2 cups semisweet chocolate morsels
1/3 cup whipping cream
1/4 cup butter, cut into pieces
Praline Frosting
1/4 cup butter
1 cup brown sugar, firmly packed
1/3 cup whipping cream
1 cup confectioners' sugar
1 teaspoon vanilla extract
1 cup chopped pecans, toasted