1. Combine chicken broth and ancho chiles in a microwave-safe bowl. Microwave at HIGH for 2 minutes or until chiles are tender; cool slightly, Combine broth mixture and corn in a blender; process until smooth.
2. Lightly spoon masa harina into dry measuring cups; level with a knife. Combine masa harina, salt, and baking powder, stirring well with a whisk. Cut in lard with a pastry blender or two knives until mixture resembles coarse meal. Add broth mixture to masa mixture; stir until a soft dough forms. Cover and chill until ready to use.