Eggless orange cake

I tried this cake when my son Devom turned 4 months old. I was a little hesitant to try it our but since my in-laws were here and they don't eat eggs I just though of giving it a shot. It came out better than any one expected and every one just loved it. It was gone even before two days. My FIL has sweet tooth like me but my MIL is more like she can eat if somethings there... but they both absolutely loved it and my MIL asked me to prepare it once before she leaves. I was go glad to hear that....

Ingredients
1/2 tin condensed milk (200gms)
2 3/4 cups plain flour (280gms)
1 tsp baking powder
1/2 tsp baking soda (soda bicarb)
2 tsp icing sugar
1/2 cup butter melted (60gms)
1/2 tsp vanilla essence
100 ml milk
100 ml soda water

Method
1. Sieve flour, baking powder, baking soda, sugar, all together 2 to 3 times. Keep aside.
2. Pour condensed milk in a bowl. Add the butter, and beat well till smooth. Add the flour spoon by spoon, mixing into the condensed milk mixture. In between, add milk as required if the butter begins to get too stiff. [Stir the mixture in one direction only all the while. This will incorporate more air and make the cake lighter].
3. Once all the flour is used up, beat the batter as above till light (5-7 minutes). Add the soda and mix gently till smooth.
4. Pour into a greased cake tin. Do not smooth with a spoon etc. If the consistency is right this will not be needed.
5. Pre-heat over to 300o c. Place tin inside. Bake at 200o c for 5-7 minutes and 150o c till done. (35 to 40 minutes).
6. Poke with a skewer and check. Cool it. When it is cold, take it out & cut it to desired sized slices and serve.