The Hornets were humbled by a 6-1 thrashing at Liverpool before the international break, with Mazzarri stewing over the display until he got all of his players back from their respective duties.
The Italian declared last week that he wanted his squad to be "as angry as him" to get a result and they delivered with a 2-1 success over the champions.
That victory means Watford sit eighth in the Premier League heading into this weekend's matches, just a point shy of Manchester United.
But the former Inter Milan boss wants the same intensity as the Leicester game when they welcome Stoke to Vicarage Road for Sunday's noon kick-off.
"This has been the subject of the whole week at the training ground," he said when asked if he wants the anger to remain.
"Now we have to continue getting the positive results, and this is what an important team has to make the next big step.
"We have to go onto the pitch angry as when we went against Leicester, and always thinking that we lost the previous game, so we have to come back as angry as we were then.
"The important thing is to go altogether with great team spirit and continue to fight."
Watford changed their shape ahead of the Leicester game, reverting to playing one out-and-out striker as the misfiring Odion Ighalo dropped to the bench.
Etienne Capoue and Roberto Pereyra scored the goals to see off the Foxes as skipper Troy Deeney continues the wait for his 100th goal for Watford.
But Mazzarri refused to be drawn on whether he would stick to the new formation going forward.
"To say that we play with one or two strikers, it is very difficult to confirm," he added.
"Even if we take into consideration Nordin Amrabat, he came here as a forward and has been playing as a winger.
"We could have said we were playing with three strikers and now it is with two
What counts at the end of the day is with what mechanisms the team move around the pitch with and how well we play.
"When we played with one striker you could see all the different occasions we had to score against Leicester, one striker, three strikers, it is not important."
Source : PA