Cake:
3 cups packed brown sugar
3/4 cup canola oil
3 eggs
2 2/3 cups flour
2 1/4 teaspoons baking powder
2 1/4 teaspoons baking soda
1 1/2 teaspoons salt
1 tablespoon vanilla extract
1 1/2 cups milk
1 1/2 cups water
1 1/8 cups cocoa powder

Frosting:
1 1/2 pounds sweet butter, soft
3 cups sifted powdered sugar
2 tablespoons vanilla extract
1 pinch salt

Ganache:
1 1/4 cups semisweet chocolate chips
3/4 tablespoon light corn syrup
3/4 cup heavy cream