The 27-year-old notched his seventh top-flight goal in 15 appearances this season to help the Toffees to a 3-1 win against Roy Hodgson’s men.
“It is always important to score as a striker,” Niasse told club website.
"I had played two games in a row and not had that luck – especially against Leicester.
“But against Palace, I had a great opportunity to score in the second half and it was great to do it in front of our fans.
“If you miss a chance, you have to keep going, playing your game, and doing everything to help the team.”