Originally by Pappa DomQuotePersonally, I think it would be helpful if people could not only elaborate a little more on the ballparks temperatures and times (and their reasoning) but also on the other ways (visible, olfactory, etc) of telling when the ground spices are actually cooked properly. I think Apprentice touched on this and suggested a more detailed explanation may also help her.
Hi Pappa

Don't be scared

I've got me muzzle on ;D
The trouble is, there is no hard and fast rule. Having an exact time or temperature makes little difference for the factors I have posted above. I have never read in any cookbook any guide which tells you what temperature exactly a "low heat" is, or any other heat for that matter. Deep fat fryers and ovens have temperature gauges, gas rings/electrical hobs don't usually, but they do have markings showing low, medium and high. I'm afraid I and most cookery books assume that everyone would know or have some approximation of what "a low heat" means, and I'd suggest you start there and either turn the heat up if needed or down if such be the case.
All recipes tell you an approximate cooking time or what to look out for (in this case, the toffee-like aroma which I and others have described, once you smell it, you'll know it forever

and there are different ways to achieve this, you must try the different ways and settle on a technique which suits you or in your opinion gives the best results.

If you read up on roasting spices, the general consensus is to roast over a low heat until the spices give out their aromas, no doubt if there were a hard and fast rule they would state warm your pan to X degrees before adding the spices, but the cookbooks tell you to
rely on your other senses (smell in this case). Obviously if you have no sense of smell, this is going to be a bit of a bugger lol

You have to learn to trust your nose, but the more you use the spices, the better you'll be able to tell.
No doubt Heston Blumenthal would know the best temperature for each individual spice to release their aromas, (perhaps Rai could e-mail him since the issue seems of such importance) but we're not all that anal about it are we? I mean I like chicken tikka but I'll be buggered if I'm gonna dig a pit in my back garden like Heston did, I'll stick to Blade's chicken tikka recipe and method thank you very much ;D
Don't forget, we use spice mixes so individual spice times are irrelevant, the best way to tell is with your nose and I'm afraid that comes with experience. Smell your raw spice mix, then keep smelling it as you heat it, (same for roasting spices pre-curry making or in the actual curry-making process itself) if there is little or no change in aroma, turn the heat up slightly (continuing with only slight increases if enough heat is not generated), you should be able to tell when it's burning by the aroma...but when you get that toffee-like hit, you have to move fast as it is not far off the burning stage (as I believe parker21 stated in an earlier post).
BTW if you haven't tried Blade's tikka recipe, you really must, it's delicious!

;D