The Whites play host to Gus Poyet’s side on Tuesday evening, after holding them to a 0-0 draw in their first meeting at the Stadium of Light.
And striker McCormack is confident that their more recent performances at Craven Cottage should give them the confidence to cause an upset and set up a trip to face Bradford City in the Fifth Round Proper.
Fulham v Sunderland
The FA Cup
Fourth Round Proper replay
7.45pm, Tuesday 3 February 2015
Craven Cottage
Winners receive £90,000 from prize fund
"It would be great to go through," said McCormack, who joined Fulham in a big-money switch from Leeds United last summer.
"It’s a good chance at Craven Cottage, where we’ve proven we can beat anyone – we can blow teams away and we’ll definitely be looking to do that.
"I’ve heard a lot of people say that we should have beaten Sunderland at their place, but if you look at the game they had quite a few chances.
"Betts [Marcus Bettinelli] probably kept us in the game so I think a draw was a fair result in the end.
"If we were given that before the game, a clean sheet against a Premier League team and taking them back to the Cottage, I think we might have taken that."
The Cup replay will come as a welcome distraction for Kit Symon’s side too, following their narrow defeat against Blackburn Rovers at the weekend.
Fulham lost 2-1 at Ewood Park, but with plenty of promising young players being integrated into the squad, McCormack knows that the future is bright at the west London club.
"It was just one of those games. It’s done now and we go into Tuesday and are looking forward to a nice, good Cup game," he told FulhamFC.com.
"We won’t drop our heads, we had a chat after the game – we’ve got a young team, we feel we’re making good strides.
"After the first seven or eight games of the season we had one point.
"Compare that to where we are now and it shows that we’re a good set of lads with good character and good ability.
"It’s important that we stay together and try and help the young boys around the squad to improve."
Watch the highlights of the first tie at the Stadium of Light