Our local Indian t/a's all seem to turn out OK curries some better than others and my madras can match the best of them

BUT when it comes to Onion Bhaji's I just can't get close

although I have tried many of the recipes on the forum none come close to our t/a's.
I have just been looking through the menu's from a few of our local t/a and all of them listed ' Onion Bhaji's, sliced onion with spices, deep fried in .....Butter
I do remember some months ago asking the owner of one of the t/a if it was butter ghee they cooked their bhaji's in and he replied ' no vegetable ghee '

Does anyone have any experience of deep frying Bhaji's in butter/veg ghee ?