Chocolate-box

Origin

From the artwork seen on boxes of chocolates.

Full definition of chocolate-box

Adjective

1. (derogatory) Having a twee picturesqueness.
• 1961, Lawrence Hanson, Elisabeth M Lawrence, Impressionism: golden decade‎He painted a chocolate-box picture for the Salon, entered it, was admitted.
• 1982, Sterling M McMurrin, The Tanner lectures on human values‎The impressionists showed us something about the world, Cezanne something different, a chocolate-box painting nothing.