3 large sweet potatoes
3 tablespoons butter, softened
1 cup packed brown sugar
1 cup chopped pecans
1 cup flaked coconut (optional)
1/3 cup all-purpose flour
1/2 cup white sugar
2 eggs
1/4 cup milk
1 tablespoon grated orange zest
3 tablespoons butter
1 teaspoon vanilla extract
1/2 teaspoon salt