This orange chiffon cake recipe is a citrusy twist on the classic chiffon cake. Made with the Thermomix, it is light, fluffy, and has a bright orange flavor. The cake is made with a combination of cake flour, sugar, baking powder, salt, vegetable oil, egg yolks, water, orange zest, and orange juice. The egg whites are whipped separately and then folded into the batter to give it its signature airy texture. This cake is perfect for serving with a dusting of powdered sugar and fresh orange slices.