Cocoa Fudge Cookies

Bahan-bahan (24 porsi)

• 1 cup all purpose flour
• ¼ teaspoon baking soda
• ⅛ teaspoon salt
• 5 tablespoons salted butter
• 7 tablespoons unsweetened cocoa powder
• ⅔ cup granulated white sugar
• ⅓ cup packed brown sugar
• ⅓ cup plain nonfat Greek yogurt
• 1 teaspoon vanilla extract