Soft Chocolate Sugar Cookies | Food Stuff

Ingredients

• 1/4 teaspoon baking powder
• 1/2 teaspoon baking soda
• 14 tablespoons butter
• 1 3/4 cups packed (12 1/4 ounces) dark brown sugar
• 1 large egg plus 1 egg yolk
• 1 1/2 cups plus 2 tablespoons (8 1/8 ounces) all-purpose flour
• 1/3 cup (2 1/3 ounces) granulated sugar
• 1/2 teaspoon salt
• 3/4 cup (2 1/4 ounces) unsweetened cocoa powder
• 1 tablespoon vanilla extract