First grease an 8 inches round tin with oil and then dust flour over it, tap to remove excess flour, set aside.
Keep a sieve over the mixing bowl - add flour and baking powder to it.
Preheat oven at 18-0 deg C for 10mins. Sieve flour well it well. Set aside.
In another mixing bowl take 2 eggs, whip it until frothy. Add half of the sugar. I used my electric hand mixer.
Whip it again then add remaining sugar and whip until fluffy and lite.
Now add oil to it and mix well with a hand whisk. Now add flour.
Mix well so that there are no lumps formed. Add butterscotch essence.
Whisk well. Bring everything together using a spatula. Now transfer the prepared batter to the greased cake tin.
Bake in preheated oven at 180 deg C for 35-40mins or until the top turns golden. Check by inserting a tooth pick in the center of the cake, if it comes out clean then your cake is done, if its sticky then you need to bake for few more mins.
Cool down the cake at least for an hour.