Interesting question - most of these I can get within 500 m of my door or not much further here in a London UK neighbourhood that is largely Turkish but also Jewish, Caribbean, S Asian, and African groceries. In fact, the local Post (mail) shop is run by an Indian family and would have many in their excellent display, and in London and UK generally the wide distribution of South Asian home cooks and restaurants means things like amchoor are easily found, even in supermarkets.
I think some get hidden having multiple names
- Sumac - yes,
- kokum - no
- mace - yes
- anardana (dried pomegranate seeds) no
- amchur (dried mango powder) yes (amchoor)
- ajwain - no
- grains of paradise - had in the past, as melegueta pepper (not the same as malagueta chilli)
- juniper berries - yes
- black cumin (kala jeera) - had in the past
- long pepper - had in the past
- nigella seed (charnushka) - yes, called kalonji here
- annatto seed - no
- wattleseed - no
- green cardamom - yes
- pasilla de Oaxaca chile - no
- dried kaffir lime leaves - yes, now called by the Thai name makrut to avoid the K word, fresh and frozen often available which I prefer
- galangal - yes, bought fresh, in my freezer
- mahlab (sour cherry pit) - no
- fenugreek - yes
- sweet flag - no
- serrano chili powder - no
- Ceylon cinnamon - no
- fennel pollen - no
- dried avocado leaves - no
- wasabi root - no, little pots of prepared wasabi condiment from the Japan centre
- black truffle salt - no, black truffle oil bought in Hungary
- ghost chili powder - no
- saigon cinnamon - no
- vanilla paste – no; whole vanilla pods and true vanilla extract, paste easily obtained locally
- black cardamon - yes, also known as large cardamom
- Szechuan peppercorns - yes
I have different kinds of chilli - Kashmir chillies and Chinese Facing Heaven chillies rather than the Mexican/American varieties which can be harder to source here; I do have Aleppo Pepper (Turkish pul biber), a mild chilli flake which is ubiquitous
I dislike cinnamon except in moderation, so wouldn't stock special varieties
I had both melegueta pepper and long pepper and hardly used them, so no longer keep them, but easily replaced
Some I have that might be considered rare by others are Curry leaf (Murraya koenigii), both dried and frozen, star anise and asafoetida
In an Anglo-French household, the idea that juniper is rare or exotic is a little strange - how would you make pâté maison without it - or gin of course, and mace is also used a lot in charcuterie and old-fashioned English cooking - essential in many varieties of butchers sausage and potted meat and shrimps.