With the mixer still on medium speed, add in the baking powder and salt. Gradually, add in the masa, alternating with the chicken broth, beating until the ingredients are well mixed, 10-20 minutes. The dough should be light and fluffy, almost the texture of a buttercream frosting. It should not be runny and should hold its shape when scooped with a spoon. A lighter textured, well mixed masa will produce a fluffier tamal when cooked. See notes on salt.
1 tsp baking powder, Salt to taste, 2 lbs masa for tamales, 2/3 cup chicken broth