The spanish onion no doubt would end up sweeter, not least so because you likely chopped it in larger chunks due to it's greater size over a standard cooking onion. It's naturally less bitter / oniony in the first place, so a milder flavour may well have resulted, possibly helping to bring the sweetness through.

That said, I like a base made with Spanish onions. Everyone has there own preference I guess. The BIR cash and carry's stock both and the BIR's I've seen chopping onions do tend to use really large ones, possibly Spanish, possibly not.

I'm really glad you had success with SnS's June 2008 base. It's my favourite, and I've tried more than a few! ;D

Don't worry about it WB.

It never separated when I made it either (refer to previous posts in this thread).

It's really not a problem...and it's arguably desirable that it doesn't separate anyway (unless you're deliberately trying to generate recovered oil for subsequent cooking with).

Oh, and welcome to Cr0 

i've revisited this base which i've made many many times and sort of feel i've learnt what i know on currying around it. i'd not made it for quite a while now though having worked on the adapted version of the CR02 development base for near on 6 mths.

bottom line - this base does not disappoint.

also it always sticks in mind mind how after tasting real BIR base that this is the closest to it of the bases that i've made from the site.

the yield is brill at 4.5L (15 potions). i actually overflowed my pan at one stage. i will also need to water it down more but that's just to suit my stove which needs a very thin base due to the heat.

i wanted a lot of curry gravy oil this time so used more input oil than i've ever done before (1000ml c/ 500 morm). this base does not disappoint either in being able to reclaim it. i returned 900ml to the bottle before blending. i was surprised that taking so much oil out did not affect the taste as i'd previously anticipated that more spice would have been needed to compensate.

i did use whole spices and fresh coriander which are my norm but not technically as per spec.

i also for the 1st time following alfieb's prompt https://curry-recipes.co.uk/curry/index.php?topic=1894.msg30927#msg30927 doubled the garlic. hard to say without a side by side comparison but i too felt it moved the base in the right direction and will adopt as std.

have attached pic of finished base

nearly forgot - reason for revisit - this base uses what i call simple spicing. i felt for some time that this is the best approach. i've wrestled with using curry powder, mix powder and the dreaded garam masala. my mind is now made up simple is best. i don't even need to cook with this base - the taste say's it all.

Sorry,forgot to add,there is no garam masala in this recipe,is this correct?
Also is a base necessary to make a curry?

....... and no garam masala!