Brandon Taylor had 18 points and seven assists while Delon Wright added 17 points and eight assists to help No. 12
After losing to then-No. 10
Jordan Loveridge scored 14 points for Utah, which played without Jakob Poeltl (ankle) but exploited a 20-1 edge in points off turnovers to turn the game into a blowout.
DaVonte Lacy scored 15 points and Jordan Railey had 12 for the Cougars (9-9, 3-3). Josh Hawkinson had 12 points and 10 rebounds for his 11th double-double of the season.
The game could have been capsulized in one play that gave Utah a 78-58 cushion. Wright nabbed his third steal on an entry pass, found Taylor on the fast break and he threw an alley-oop pass to Dakarai Tucker for a layup.
Taylor's 3-pointer gave Utah a 60-42 advantage, but the Cougars took advantage of a Utes cold spell and made three 3-pointers in a row. Brett Boese, who had 12 points, hit a long-range jumper that drew the Cougars to 62-52 with 10:54 to play.
Washington State led by four early and trailed 27-25 before the Utes picked up the pressure and prevented the Cougars from converting another field goal the rest of the half.
On the other end, Loveridge sparked a 19-2 run with a 3-pointer while getting fouled. The Utes led 46-27 at the break.
After receiving a "good, old-fashioned beatdown" at Arizona, as Utah coach Larry Krystkowiak put it, the Utes again lost the rebounding battle (35-30) but dominated in all other phases of the game.