Classic Tamale Batter

In the bowl of an electric mixer fitted with the paddle attachment, combine the lard, baking powder, and salt. Beat until light and fluffy. Add 1 cup masa and 1/3 cup stock; beat until thoroughly combined. Add the remaining masa and 1/3 cup stock; beat until light and fluffy, about 2 minutes. The batter should be soft but hold its shape in a spoon. If using fresh masa, test the batter to determine if it is adequately fluffy, ensuring light and tender tamales: Drop 1 teaspoon batter into a cup of cold water. If it floats to the surface, it is ready. Refrigerate at least 1 hour. Store batter in an airtight container, refrigerated, up to 2 days.