buckwheat flour
wheat malt flour
May contain gluten, which some people are intolerant to.
Caution
May cause symptoms in more sensitive people. Track your own reaction.
The malting process promotes the release of histamine. For this reason, wheat malt is generally not recommended. However, according to the SIGHI list, baked goods made with malted flour (without specifying the type of grain) are listed as well-tolerated.
Safer alternatives
Suitable
Potato dumpling
Potatoes are low-histamine, and so is flour.Rye
Naturally low-histamine, but watch out for fermented products from rye