Matzo must be ground from one of the five grains specified in Jewish law for Passover matzo: wheat, barley, spelt, rye or oat. Per Ashkenazic tradition, matzo made with wine, fruit juice, onion, garlic, etc., is not acceptable for use at any time during the Passover festival except by the elderly or unwell. Matzo dough is quickly mixed and rolled out without an autolyse step as used for leavened breads. Most forms are pricked with a fork or a similar tool to keep the finished product from puffing up, and the resulting flat piece of dough is cooked at high temperature
Nordic bread culture bakers’ guild became the triangular "skonrogge" (i.e. a small leavened rye bread that is cleaved and baked again until dry, also Danish beskøjt, French biscuit, Latin bis-coctus: baked twice). Around 1600, the skonrogge was replaced as the baker’s emblem by the pretzel-shaped "kringle", which is still the emblem of the bakers’ guild today. We find the first systematic description of Danish bread in 1821 in Charles Adolph Dénys Mourier’s book on bread and bread-making. He describes various leavened bread types: "rugbrød" (whole rye bread), "franskbrød" (white wheat bread), "sigtebrød" (sifted rye bread) and "tvebakker" (wheat biscuits), as well as unleavened