1. Preheat oven to 425°. Line a baking sheet with parchment paper.
2. Combine first 4 ingredients in a large bowl. Cut butter into flour mixture with a pastry blender or fork until mixture resembles fine crumbs.
3. Whisk together cream and egg; add to dry ingredients, stirring just until dough comes together. (Dough will be sticky.) Turn dough out onto a lightly floured surface; knead with floured hands 4 or 5 times. Pat to 1 1/2-inch thickness. Cut into 6 rounds with a 2 1/2-inch round cutter, and place 2 inches apart on prepared baking sheet.
4. Bake 12 to 15 minutes or until golden. Cool completely.