Van Wolfswinkel arrives from Sporting Lisbon.
He said: "I am sure I can help take Norwich to that next level now.
"There is already a great team there and I hope I can add to that. I will love working with the team and the coach and I see a very good future for us all - for me and for Norwich.
"The Premier League is always a place I have wanted to test myself. For me Norwich is the perfect club and the perfect place to be."
He added: "Like every coach wants when they bring in a striker, he (Hughton) wants goals. Simple.
"He knows my qualities and said to me, 'just use them and you will score goals which will be really important for the team'."