1 c. butter, room temperature
1 c. sugar
1 egg, separated
1/2 tsp. cinnamon
2 c. all-purpose flour
1 c. finely chopped walnuts or pecans

Cream butter, sugar and egg yolk until light; mix in cinnamon. Add flour and beat to blend. Press dough on lightly greased sheet until 3/8 inch thick. Beat egg white and brush on dough. Scatter nuts on top and press dough out again to 1/8 to 1/4 inch thick. Bake at 375 degrees for 15 to 20 minutes. Remove from oven and mark into 1 to 1 1/2 inch squares. Cool. Store in airtight canister.