Cooling down a solution of ethyl acetate will most likely give you a polycrystalline solid. No use if you want a single crystal.
You could obtain single crystals by evaporating ethyl acetate under reduced pressure at room temperature and condensing it on a cold finger (filled with liquid nitrogen, or better liquid helium). This method usually gives nice single crystals. If you find those crystals to be too small, you could use them as seeds in the Czochralski process.
Or else, go to work in Antarctic during a harsh winter storm
Good luck