Cat drank white chocolate blended coffee drink?

There is a friendly cat that always hangs out around campus and on the way back to my dorm I stopped to pet him and I had a white chocolate blended coffee drink and he kept sniffing it and I figured he was probably pretty hungry and he probably wouldn't like it anyways so I poured some in a little puddle on the concrete and at first he just sniffed it and walked away but a few minutes latter he was lapping it up like crazy so I gave him more before I left and when I got back I realized that all that cafene and chocolate, milk an sugar probably isn't good for him so I just want to make sure it wasn't goin to make him really sick or anything. He probably had less than 1/4 of a cup.