While a far cry from this Tumblr thingy, it turns out dwarves liking spicy food is now canon in Warhammer.
The following quote's about imperial dwarves. WFRP 4e: Archives of the Empire, page 54
A tavern's kitchen is large, as Dwarfs have hearty appetites. While a number of taverns have Halfling cooks, the majority are staffed by Dwarfs who make heavily spiced dishes. Dwarfs are fond of food with sharp tastes to compliment the potency of their brew.
The following quote about karak dwarves mentions dwarves making bread, but I think the rest of it might fit into Divided Loyalties. WFRP 4e: Archives of the Empire, page 69
Fortified farms grow the mountain hops and barley used by the Brewer Clans and supply wheat to make bread in dwarfen kitchens. Turnips, beans, mustard, parsnips, and fire peppers (the latter brought by Elf traders during the Golden Age) are also grown in their fields.
Now I'm weirdly curious about what the halflings in Eight Peaks are growing and how that meshes with the dwarf immigrants' palates. If the halflings are making their usual fair, are the dwarves bothered they're not getting their usual food anymore since Eight Peaks' food growers aren't dwarves? Do they import food as a result? Alternatively, have the halflings taken to planting new crops to cater to the karaks' dwarves appetites?
Then there's the Stirlanders. While writing the above I remembered
this bit of this funny video and decided to go see what Stirland's cuisine actually was. I found only one thing, and was quite surprised to see that the meme video was 100% truthful about it.
WFRP 2e: Sigmar's Heirs, pages 85 and 87
"The entire province is insane, I tell you! Why? They like their ale hot! It's nothing short of blasphemy against good beer!"
—A Dwarf of Karaz-a-Karak
Most of the Empire regards them [Stirlanders] as savages, simply for their custom of drinking hot ale. Taverns Stirland over have a large iron poker kept by the fire. Cold travellers and old soaks thrust the poker into the fire whilst awaiting their drink, and then plunge it into their tankard—warming the drink and making an alcoholic cloud of steam.
Then a shock hit me as I realised Mathilde was a Stirlander! And had her Dooming and became a legal adult before going to the Colleges! But I calmed down when I remembered she said she hasn't practised her village's traditions in decades. However, I'm now held in the grips of fear as I've realised she still has Wurtbad Townsfolk as one of her Connections in her character sheet. I don't know Mathilde's tastes in beer and I dare not ask.