[jrapdx3]

"Prickly ash" is an ingredient in Chinese cuisine, particularly Szechuan cooking. We buy it in quantity at Asian groceries where it's pretty inexpensive.

In the US it's known as "Szechuan peppercorn". Preparing it for use requires carefully inspecting a handful for stems and thorns (which can be quite big), pan toasting and crushing/grinding to a coarse powder.

As pointed out in the sister comment, the spice has a mild numbing effect which counters the heat of chilis. Adding a little to hot dishes makes the flavor more complex and enjoyable.

For people who like to cook it's an ingredient worth experimenting with across culinary boundaries.

[ghc]

Part of the problem with the English translations is this ambiguity. Sansho comes from a different species (Zanthoxylum piperitum) of the same genus, native to Japan and Korea. The flavor is different, but reminiscent. I keep both sansho and red Sichuan peppercorns for use in different dishes.