The invention relates to a kneader machine for alimentary doughs including a container provided with a tight lid and a rotor rotatably arranged in the container about a vertical rotation axis (A), wherein the rotor has a flat base consisting of a plurality of arms and a plurality of mixing paddles which extend from the arms in a vertical direction (V), and wherein the arms of the rotor have beveled surfaces formed along their peripheries on the sides intended to face a rotation direction of rotation (R) of the rotor. The mixing paddles have first and second mixing paddles configured so as to generate between them a whirling motion of the particles of the solid ingredients on a plane (P) passing through the rotation axis (A) of the rotor and perpendicular to its base. The invention also relates to a method of making an alimentary dough by using the kneader machine.