Demba Ba took his goal tally to 12 in 15 games following his brace against Kasımpaşa.
Beşiktaş won the game 2-0, the first time the Black Eagles have won a league game by a two goal margin.
The Istanbul giants have yet to lose a game in which the former Chelsea striker has scored.
Beşiktaş have won six and drawn one game in which Demba Ba has scored in since joining this summer.
The 29-year-old also became the first Beşiktaş player to score seven UEFA competition goals in one season following his brace against Partizan.
The powerful strikers performances have sparked interest from a number of Premier League outfits.
The Senegalese international scored 50 goals during his stint in England. Ba played for West Ham, Newcastle and Chelsea before joining Beşiktaş.
Ba moved to Besiktas from Chelsea for £6 million during the summer transfer window.