Nutmeg Flats

• butter, softened↗1 cup
• sugar↗1 cup
• egg, separated↗1
• flour↗2 cups
• freshly grated nutmeg1 1⁄2 teaspoons

Step-by-step instructions

1. 1

   Preheat oven to 275. Grease a 10x15-inch jelly roll pan.

2. 2

   Cream butter and sugar until light and fluffy; add egg yolk and beat well. Blend in flour and nutmeg.

3. 3

   Turn into prepared pan, spreading evenly with fingertips. Brush top with beaten egg white.

4. 4

   Bake until lightly browned, about 50 minutes. Cut into bars while still warm. Store in an air-tight container.