BUTTER SPONGE CAKE - WITH EGG..

I have been in the quest for BUTER SPONGE CAKE.. like i had in Pune from Spicer College Bakery..
Finaly managed: USED MY AJJI's RECIPE with few changes

INGREDIENTS:
Maida - 1 1/2 cup (200 gm)
baking powder : 2 tspn
Amul Butter : 3/4 cup / 200 gm
Powdered sugar : 3/4 - 1 cup
eggs : 4 nos
cold milk- 5 tbspn or more as required
vanilla essence -1/2 tspn

METHOD:

1. Preheat oven to 175 deg cent. Grease, flour and line with butter paper an 8" tin
2. Sift together (thrice is what Ajji said) maida and baking powder
3. Seperate the egg whites and yolk.
4. Beat the egg whites till stiff
5. Add 1 tbspn sugar to yolks and beat till creamy
6. Beat butter and sugar till creamy
7. Add vanilla essence
8. Add half egg yolk and beat
9. Add dry ingredients in parts alternating with cold milk and yolk
10. Fold in egg white
11. Pour in tin
12. Keep foil paper under tin and bake for 45-50 min at 175 or 60 min at 160
13. if you want flat non-crusty base, cover with foil paper
14. cool in semi-opened oven for 5 min and then bring out
15. demold after 15-20 min of cooling and set on cooling rack.
16. ENJOY