Played in bitterly-cold conditions at The Hawthorns, the lads made it seven wins and a draw in nine matches in the second phase of the competition to stay top of the Elite Group.
The foundations for the victory were laid in the first half with the team's pace and movement certainly to the fore.
It also has to be noted that goalkeeper Jonathan Miles made a fine double save with the scoreline still goalless.
Cristian Ceballos and Dean Parrett had already gone close when the Baggies broke down the right on 14 minutes. Miles did well to initially block Adil Nabi's effort from six yards but did even better to get back to his feet and palm away Romaine Sawyers' follow up.
It wasn't long before we forged ahead. Parrett went wide to Kenny McEvoy and his cross on the run from the right byline was dispatched at the far post by Nabil Bentaleb.
Five minutes later and it was 2-0. Ceballos won possession and sent Parrett clear and the midfielder finished confidently one-on-one with the outside of his right foot.
Luke Daniels did well to prevent another goal minutes later as McEvoy latched onto a loose back pass but the home goalkeeper could do little about the third five minutes from half-time as Ceballos combined well with Parrett before being upended by Wesley Atkinson.
Ceballos won the battle of wills from the penalty spot, sending Daniels the wrong way.
There was still time for Parrett and Ceballos to combine again before the break, this time Ceballos struck the post from 15 yards.
The second half couldn't quite match the first in terms of chances created, but the lads continued to dominate.
It was 4-0 on 57 minutes when Ceballos worked a yard from nowhere on the right byline and chipped a cross to the far post, where Bentaleb provided a fine headed finish.
Daniels denied Ceballos one-on-one after Tom Huddlestone's 50-yard pass and at the other end, Nabi glanced just wide from Atkinson's cross.
Giancarlo Gallifuoco, Roman Michael-Percil and Laste Dombaxe entered the fray in a treble substitution on 64 minutes and Bentaleb was presented with a hat-trick chance 10 minutes later, but could only aim Zeki Fryers' cross straight at Daniels.
West Brom (4-4-2): L Daniels; Hurst, D Daniels, Jones, Atkinson; Brown (Birch, 80), Allan, O'Neil, Roofe; A Nabi, Sawyers. Unused subs: Lewis, Francis, Smart, S Nabi.
Spurs (4-3-3): Miles; Fredericks, Fryers, Hall, Byrne (Gallifuoco, 64); Luongo (Dombaxe, 64), Huddlestone, Bentaleb; McEvoy, Parrett (Michael-Percil, 64), Ceballos. Unused sub: Vigouroux.