Lightly spoon flour into dry measuring cups; level with a knife.
Combine flour, baking powder, and salt in a medium bowl, stirring with a whisk.
Cut in butter with a pastry blender or 2 knives until mixture resembles coarse meal.
Add sour cream, cheddar cheese, 1 tablespoon water, chipotle chile, and egg; stir just until moist. Knead in bowl with lightly floured hands just until dough forms.
Divide dough in half. Shape each half into a 6-inch circle on a baking sheet coated with cooking spray.
Cut each circle into 6 wedges; arrange wedges 1 inch apart on pan.
