The Huskers (3-2) shot 64% from the floor after halftime, including a stretch of 11 makes in 12 attempts, while outscoring the Cougars 48-34 over the final 20 minutes.
Haanif Cheatham led five Huskers in double figures, finishing with 19 points. Jervay Green scored 16 points to go with eight rebounds.
Nebraska also got solid games from Dachon Burke and Kevin Cross, who each scored 14. Burke added five rebounds while Cross was 6-for-8 from the field and pulled down eight rebounds.
Finally, Cam Mack had 10 points, eight rebounds and six assists.