Whole Wheat Custard Sponge Cake

I know when i bought a huge packet of yellow custard powder from Indian store, i'll finish them as soon as bakes instead of making usual fruit custards. Here comes our recent family favourite yellow spongy cake with custard powder. This cake gets ready super quick and also vanish very much quickly when served along with a hot cup of coffee or tea.I used eggs in this cake if you want to skip it