Dendrodoa grossularia is a species of tunicate or sea squirt in the family Styelidae, commonly known as the baked bean ascidian. It is native to the northeastern Atlantic Ocean where it is common in shallow water and on the lower shore in exposed rocky sites.

Dendrodoa grossularia is a solitary ascidian up to 2 cm long and about 1,5 cm in diameter. Its body has the form of a flat dome with an enlarging base but sometimes it can be erected and marble-shaped. The oral siphon is terminal, close to the atrial siphon and both are four-lobed.