Paul Townend was coolness personified as he brought Golden Silver to deny the enterprisingly-ridden Rubi Light in the feature Tote Pick Six Normans Grove Chase at Fairyhouse.
Andrew Lynch set out to make all of the running on Rubi Light and initiated a handy lead, while Townend sat contentedly in second place with the two other runners well back.
When Townend asked the 2-11 shot to gain ground on the pacemaker, the response was decisive.
The two protagonists jumped the final fence together but Golden Silver forged clear to win by five and a half lengths.
Mullins said: "The race didn't pan out the way Paul thought it might.
"We thought Adrian Maguire's horse (Let Yourself Go) might make the running.
"Golden Silver would prefer horses around him. He had to go off after the leader on his own and Paul said he hated it - the ground was quite gluey and sticky.
"When he got the other horse into sight turning for home his ears pricked and he did it, but under sufferance.
"Paul knows Golden Silver so well he leaves him alone until he comes right.
"This is his time of the year and his ground and if we can pick up money we will.
"He'll run next in the Tied Cottage Chase at Punchestown in a few weeks' time where he'll be joined by J'y Vole and Scotsirish, too.
"He'll be entered in the Ryanair Chase and Champion Chase at Cheltenham but is more likely to run in the Ryanair as he is about 10lb short of the standard for the Champion Chase."
Punters had their fingers burned when the Mullins-trained 4-7 shot Sous Les Cieux was turned over by 33-1 outsider Bayross in the Tote Pick Six Rollover Maiden Hurdle.
Leading two out in the hands of Andrew Lynch, Bayross pulled steadily clear to seal success by two and a half lengths from Sous Les Cieux. Lord Redsgirth was third.
"I was quite confident over this two and a half miles and that heavy ground helped make a difference too," said trainer John Larkin.
"He has a lovely pedigree and was a nice bit of value for 8,800 euro at the 2009 Derby Sale as he has a lovely pedigree.
"He has plenty of novice options in Ireland now and if they prove above him, he can travel to Britain."
Favourite-backers were in a better mood after Our Girl Salley landed the odds in the Tote Pick Six Mares' Novice Hurdle to stretch her unbeaten run to five.
However, the 2-5 hot-pot was made to work hard by Belle Brook (20-1), who pulled on gamely after leading briefly two out.
But Barry Geraghty kept Prunella Dobbs' six-year-old up to the job to score by three-quarters of a length, with another 20-1 shot, Lonesome Dove, third.
Dobbs said: "Our Girl Salley didn't pick up quite as well as she did the last day but I don't think Barry was too hard on her.
"Whether this ground was her ground I'm not sure.
"We'll move forward now and will aim her at another mares' hurdle here in mid-February, while she will be entered in the novice hurdles and the Mares' Hurdle at the Cheltenham Festival."
Bookmakers Paddy Power, Sean Graham and Stan James made Our Girl Salley 10-1 for the David Nicholson Mares' Hurdle at Cheltenham.
The Paul Nolan-trained Sam Adams (11-4) got off the mark over fences under Davy Russell with a sound success over the favourite Arabella Boy in the Irish Stallion Farms EBF Beginners Chase.
Nolan said: "I was a bit worried that the trip was too short but his jumping was brilliant.
"This time last year I didn't think it would take him this long to win a beginners' chase, though."
Russell completed a 12-1 double for owners the Gigginstown House Stud on 5-2 favourite Beautiful Sound, trained by Gordon Elliott, in the Tote Trifecta Rollover Handicap Chase.
There was a treble for the owners and a double for Mullins when Lovethehigherlaw, ridden by the trainer's son, Patrick, justified his prohibitive price of 1-3 in the concluding bumper.
Mullins snr added: "Lovethehigherlaw did what he had been showing me at home and I'm very happy with him as he looks a fair sort.
"I don't want to bring him to Cheltenham, and would prefer to think about the long-term picture.
"We will talk to his owners before making a decision.
"I would prefer instead to run in the Grade One bumper at Punchestown and possibly take in a winners' bumper before then."