Checkerboard Cookies

Directions

1. 1
   ["Preheat oven to 350\u00b0F. Grease and line 2 large baking trays with parchment paper.", "Cream butter and sugar together until light and fluffy. Add vanilla extract. Add egg and beat until combined. Fold in flour. Divide dough between 2 bowls. Stir cocoa powder into 1 portion then knead each piece on a lightly floured surface for 30 seconds, or until smooth. Shape into discs, wrap in plastic wrap and chill for 15 mins.", "Shape each piece of dough into a 6 x 1 1/2 x 1 1/2 inch rectangular bar. Wrap in plastic wrap and chill for 30 mins. Cut each bar lengthwise into 3 equal slices then cut each slice lengthwise into 3 strips (9 in total).", "Brush each strip of dough with egg white. Press 3 strips of dough, alternating colors, together. Repeat, forming 2 more layers of alternating colors to create a \"checkerboard.\"" Repeat with remaining dough strips. Place on tray and chill for 15 mins.""