Potash - potassium carbonate, for gingerbread dough, E501, 1 kg

Potash/potassium carbonate is a leavening agent whose carbon dioxide content loosens acidic or acid-forming doughs (potash only works in conjunction with acid), causing them to expand rather than expand during baking. The white potash is mixed with a little water, like ammonium hydroxide, to help it spread evenly throughout the dough. Potash is only used for certain honey-based Christmas baked goods (gingerbread, honey cake). 10g of potash is sufficient for 500g of flour.