freeze something into something
1. to use cold to solidify something into a different state, usually water into ice. The extreme cold froze the water of the river into solid ice. The cold snap froze the water in the puddles into hard sheets of ice.
2. to use cold to solidify something into a particular shape. We froze the ice cream into the shape of a penguin. This ice tray will freeze water into little round balls of ice.
See also: freeze