Measure and take maida and baking powder in a mixing bowl, whisk it well. Set aside.
In another mixing bowl take sugar. Add water, oil and melted butter.
Then add butterscotch essence. Whisk it well and stir till sugar dissolves completely, set aside.
Now take thick curd in another mixing bowl, add baking soda and vinegar to it.
Wait till it becomes frothy. Now add this to oil-water-sugar mixture (Mix 2). Whisk well.
Now add flour little by little and keep whisking. Whisk well so that there are no lumps, it will form a creamy flowing batter.
Now coat butterscotch chips with a teaspoon of flour and then add. Mix once with a spatula.
Now grease the loaf pan with oil, then sprinkle flour and tap off the excess flour.
Pour the batter into the prepared tin and top with butterscotch chips.
Bake in preheated oven at 180 deg C for 45-50 mins or until a tooth pick inserted in the center of the cake comes out clean , you can also see the golden top.
Cool down completely at least for 30mins then invert to de-mould. After that leave for 30mins, then slice.
Enjoy Butterscotch Cake!