Whisk egg yolks and sugar until light and fluffy. Beat in dragon fruit puree, corn oil and vanilla extract. Light mix in self-raising flour and cornflour.
In a separate clean bowl, whisk egg whites, cream of tartar and caster sugar until fluffy and stiff. Carefully fold the egg yolk mixture into the beaten egg white until well combined.
Spoon batter into cupcake liners. Lightly tap cupcakes liners to release air bubbles.
Bake in preheated oven at 170C for 10 minutes then reduce temperature to 160C and bake for another 20-25 minutes or until a skewer inserted in the cake comes out clean.
Remove from the oven and invert cake immediately. Leave undisturbed until completely cooled.
Recipe by Anncoo Journal at https://www.anncoojournal.com/dragon-fruit-chiffon-cupcakes/