2 large eggs 1 cup sugar 4 cups all-purpose flour 1 teaspoon baking powder 3 sticks salted butter, softened 1/2 cup sugar cubes, coarsely crushed
Beat together 1 egg and sugar with an electric mixer until thick and pale. Sift in flour and baking powder and add butter. Beat on low speed until mixture forms a dough. Chill, wrapped in plastic wrap, until firm, at least 1 hour.
Preheat oven to 350°F.
Lightly beat remaining egg. Roll level teaspoons of dough into balls and arrange 1 inch apart on ungreased baking sheets. Press thumb into center of each ball to flatten, leaving a depression, and brush lightly with egg. Sprinkle crushed sugar in centers and bake in batches in middle of oven until golden, 12 to 18 minutes. Transfer
to racks to cool completely.
