SABLE COOKIES

1 1/2 sticks unsalted butter
2/3 cup sugar
2 egg yolks
2 cups flour, divided use
1 egg yolk plus 1 teaspoon water, beaten

TO PREPARE THE DOUGH:
Fit processor with steel blade. Process the butter and sugar until creamy. Add the 2 egg yolks and mix for 30 seconds. Add half the flour and process until smooth. Add remaining flour and process until blended. Wrap dough in plastic wrap and chill until firm, about 2 to 4 hours.

WHEN READY TO BAKE:
Keep dough in the refrigerator until ready to use, and then roll only a third at a time on a very well-floured board. Roll about 1/8-inch thick. Cut into desired shapes with cookie cutters, or a biscuit cutter, and transfer immediately onto a buttered baking sheet. Keep the cut cookies chilled until you have finished cutting all the dough.

Heat oven to 350 degrees F.

Brush the top of each cookie with yolk-and-water glaze; sprinkle lightly with sugar.

Bake 8 to 10 minutes, until cookies are pale golden. Remove to rack and cool.

Makes about fifteen (3 1/2-inch) cookies or five dozen (1 3/4-inch) cookies
Source: Martha Stewart