Dare To Doubt made virtually all the running to complete a treble for Mullins and Townend in the paddypower.com Novice Hurdle.
Townend switched to the mare after his original mount Day Of A Lifetime was a late withdrawal and he had an armchair ride on the 7-2 chance.
The jockey was soon dictating affairs and though the pack tried to close in, he had plenty of horse under him and even a mistake at the final flight did not halt her momentum as Dare To Doubt bounded clear to win by five lengths from Prima Vista.
Mullins said: "That was a good contest and she is improving all the time. There is a big mares race in Limerick (the Listed Kerry Group EBF Mares Novice Hurdle on March 13) on the Sunday before Cheltenham and she'll probably go there.
"We'll keep her at home as her style of racing (front-running) might not suit going over to Cheltenham."
Roi Du Mee completed a hat-trick of victories over fences with a hard-fought win in the Woodlands Park 100 Club Nas Na Riogh Novice Chase under Davy Russell.
The 6-4 favourite, trained by Gordon Elliott, proved two lengths too strong for Ad Idem, who spoilt his chance with mistakes at the final two fences, though the result was only confirmed after a stewards' inquiry.
The two had the race to themselves after Alpha Ridge blundered away his hopes having made the early running, while the other runner Saddlers Native could never go the pace.
Elliott said: "He jumps well and he is improving the whole time. If you'd asked me two runs back where he'd end up I wouldn't have said here (a Grade Two winner).
"He is entered in a couple of handicaps at Cheltenham but he'll probably wait at home for another Graded race. We'll look at something like the Powers Gold Cup for him."