Preheat oven to 400 degrees F (200 degrees C).

In a large bowl, sift together the all-purpose flour, baking powder, salt, and sugar. Cut in the butter using a pastry blender until the mixture resembles cornmeal. Stir in the lightly beaten egg, cream, and vanilla, then blend well. Chill dough if desired.

On a floured surface, roll out the dough to 1/8 inch thickness. Sprinkle with sugar and cut into desired shapes. Transfer the shapes to ungreased baking sheets.