noundialect, historical Scottish, British
A wooden board used for preparing (or occasionally baking) bread or similar foodstuffs; specifically (chiefly English regional (Cumberland, Lancashire and Yorkshire)) a board, scored on the surface with a diamond pattern, used to make a particular type of thin oatcake.
The batter for the oatcake is poured onto the surface of the bakbrade and the board shaken, causing the batter to spread. The oatcake is then transferred to a baking stone or griddle for cooking.
Late Middle English. From bake + bred.