Sweet Pineapple Tamales (Tamales de Dulce)

40 to 50 dried corn husks
Hot water
3/4 cup firmly packed crushed piloncillo or brown sugar
1/4 cup lard or vegetable shortening (at room temperature)
1/4 cup butter or margarine (at room temperature)
1/2 teaspoon vanilla extract
2 cups Masa Harina