This cupcake recipe uses oil to create a moist and fluffy texture. Warm the eggs and sugar in a double boiler, then whisk thoroughly with a hand mixer. Mix in the cake flour, then add the warmed milk and rice oil mixture back into the batter and mix. Pour the batter into muffin tins and bake in the oven. Once cooled slightly, pipe whipped cream into the center and decorate with mixed berries and powdered sugar. The cupcakes stay moist even the next day, making them an easy and delicious treat perfect for Christmas and New Year's parties.