What type of compound is ethyl acetate?

It is an organic ESTER.

Ethyl acetate is the archaic name for 'Ethyl Ethanoate'.

The formula for ethyl ethanoate is

CH3-C(=O)-O-CH2-CH3

usually shortened to

CH3COOCH2CH3

It can be synthesised by refluxing Ethanol(Ethyl alcohol) and Ethanoic Acid (Acetic Acid/Vinegar).