Rich and chocolatey, these have the classic chocolate cookie taste and the perfect consistency. ½ cup butter (1 stick), softened but still cold ¾ cup white granulated sugar 2 eggs 3 tablespoons plain yogurt 1/3 cup unsweetened cocoa powder (I use super-dark dutch cocoa to make especially rich chocolate cookies) ½ cup oat flour (check for gluten-free) ¼ cup cornstarch (check for gluten-free) 1 tablespoon baking powder ½ teaspoons salt 1 ½ teaspoons ...