  Probing the superconducting order parameter symmetry is a crucial step
towards understanding the pairing mechanism in unconventional superconductors.
Inspired by the recent discoveries of superconductivity in various van der
Waals materials, and the availability of the relative twist angle as a
continuous tuning knob in these systems, we propose a general setup for probing
the order parameter symmetry of two-dimensional superconductors in twisted
Josephson junctions. The junction is composed of an anisotropic s-wave
superconductor as a probe and another superconductor with an unknown order
parameter symmetry. Assuming momentum-resolved tunneling, we investigate
signatures of different order parameter symmetries in the twist angle
dependence of the critical current, the current-phase relations, and magnetic
field dependence. As a concrete example, we study a twisted Josephson junction
between NbSe2 and magic angle twisted bilayer graphene.
