Aaron White had 18 points and 10 rebounds, Melsahn Basabe added 16 points with 10 boards and No. 20 Iowa routed Northwestern 93-67 Thursday night.
Devyn Marble scored 15 points for the Hawkeyes, who never trailed despite playing without coach Fran McCaffery.
He was suspended one game by the Big Ten for an outburst directed at officials during last weekend's loss at Wisconsin.
Iowa (13-3, 2-1 Big Ten) opened the game on a 10-0 run and never looked back.
The Hawkeyes led by double digits the entire second half, improving to 10-0 at home.
JerShon Cobb had 18 points to lead Northwestern.
The Wildcats (7-9, 0-3) were outrebounded 41-28 and they let the Hawkeyes shoot 8 of 14 from 3-point range.