FOR THE SCONES: – 1 & 3/4 (210g) cups all-purpose flour – 1/2 cup (45g) old-fashioned rolled oat – 3 tablespoons (38g) packed light brown sugar – 1 teaspoon baking powder – 1/2 teaspoon baking soda – 1/4 teaspoon salt – 2 teaspoons ground cinnamon* – 1/2 cup (113g) unsalted butter, cold and cut into 1/2-inch cube – 1/2 cup (120ml) buttermilk – 1/2 teaspoon vanilla extract or almond extract FOR THE GLAZE: – 1/2 cup (55g) confectioners' sugar, sifted – 1 to 2 tablespoons milk