The invention relates to a device for portioning a dough mass, comprising a receiving chamber for holding said dough mass comprising a discharge opening, a pair of opposing rotary cutters provided at the discharge opening and arranged for rotation in mutually opposite directions, wherein each cutter comprises at least one blade rotatable around a rotary axis, which blade cooperates with the blade of the other cutter for cutting the dough mass into separate portions, and a release agent delivery system for applying a release agent onto the blades of the rotary cutters, wherein the release agent delivery system is configured for applying the release agent on opposing sides of each of the blades. The invention further relates to a release agent delivery system for use in such a device and a method for portioning a dough mass using such a device.