Checkerboard Sablés (Metric)

• 200 g sugar
• 325 g all purpose white flour
• 130 g butter, unsalted, diced, chilled
• 1 egg, large
• ½ tsp vanilla extract, natural (可选的)
• ¼ tsp salt

Chocolate Dough

• 325 g all purpose white flour
• 130 g butter, unsalted, diced, chilled
• 1 egg, large
• 30 g cocoa powder, unsweetened
• ½ tsp vanilla extract, natural (可选的)
• ¼ tsp salt