Composed element, with at least two wood-based panel-shaped elements; wherein said panel-shaped elements can be coupled to each other at an angle and with a miter joint by means of a locking tongue and groove connection; wherein the tongue consists of a split tongue, with thus at least a first tongue portion and a second tongue portion, as well as a slit situated there between; characterized in that said slit, seen in cross-section, globally extends according to a direction which deviates from the direction of the center line of the panel-shaped element on which the tongue is provided.