Chocolate Brown Sugar Sables

Ingredients

• 2 oz dark chocolate, grated and chopped, finely
• ¾ cup flour
• ¼ cup cocoa powder
• ½ teaspoon salt
• ¼ teaspoon baking soda
• ¾ cup brown sugar plus 1 tablespoon
• 10 tablespoons butter, room temperature
• 2 egg yolks
• 1 teaspoon vanilla extract
• 1 teaspoon water
• ½ tablespoon sesame seeds
• pinch of sea salt
• ½ tablespoon sugar