Tunnbröd (Swedish: [²tɵnːbrøːd]; literally "thin bread") is the Swedish version of flatbread and properly belongs to northern Swedish cuisine where housewives share a common bakery to produce it. Tunnbröd can be soft or crisp, and comes in many variants depending on choice of grain, leavening agent (or lack thereof) and rolling pin. The dough is made from any combination of wheat, barley and rye; the leavening agent can be both yeast and ammonium carbonate. Another traditional old Swedish method of eating soft Tunnbröd is burrito style, combined with mashed potatoes and roasted herring.