A turbine engine blade blank obtained by metal casting, comprising a first direction (Z) along which a blade (13), a platform (12), and a root (11) are consecutively formed, the platform (12) extending in a second direction (X) substantially perpendicular to the first direction (Z), the blade (13) comprising a pressure-side face (14) and a suction-side face (15) which are connected to each other by a trailing edge (16) and a leading edge (17), the root comprising retaining surfaces (23, 24) along the first direction (Z) which are intended to cooperate with corresponding surfaces of a turbine engine disc to radially hold the root during rotation,
- characterized in that the blade blank (100) comprises at least one shroud (200) extending in a third direction (Y) substantially perpendicular to the first and second directions (Z, X), this shroud connecting a retaining surface (23) to the platform (12) in the first direction.