In a water bath bowl, add in sugar and egg and whisk until the sugar dissolve and the temperature around 42°c.
Once warm, beat it using stand mixer or hand whisk. Beat until super fluffy.
Once fluffy, incorporate the flour slowly a little at a time.
After finish adding the flour, fold in corn oil.
Transfer it in 26 inch baking pan.
Bake in 180°c preheated oven for 25 minutes or until toothpick came out clean.
Cut it into the desired thickness.