Soak corn husks in warm water for at least 30 minutes.
In a mixing bowl, beat the shortening until fluffy.
Gradually add masa harina, baking powder, and salt.
Pour in chicken broth gradually, mixing until a dough forms.
Take a soaked corn husk and spread about 2 tablespoons of masa dough on it.
Add a tablespoon of your chosen filling in the center.
Fold the sides of the husk over the filling, then fold up the bottom.
Place the tamales upright in a steamer pot.
Steam for about 1 hour, adding water as needed.
Once cooked, let them cool slightly before serving.