This has been on my radar since i first joined the forum. As for it not being BIR - why?? :

The only ingredient i haven't seen used in a tikka marinade is ground fennel / star anise. Everything else is quite common place.Since we know that this is used in some BIR's as a final addition, there's nothing to say that it may not be added to some BIR marinades. No pastes!!! Could that be the reason?? I only started using the stuff when i joined!!!! Until then it was PC's tandoori masala all the way and that has remained my TM of choice over the pre-packed stuff. That's only about 30 years ago

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Next lot of chicken tikka will be done using this recipe. One question i have though is how discernable is the sugar in the final taste, ie. does it add a slight sweetness to the finished tikka or does it simply merge into the overall flavour? Reason for asking, on a rare occasion i tried tikka, it was delicately spiced but had a sweetish after taste and was absolutely deliscious