A defensive mishap saw the visitors take a 26th-minute lead through Lars Veldwijk’s header to silence the home fans at Abe Lenstra Stadium.
However, Johnny Jansen’s men put up a commendable second-half display to extend their unbeaten run to seven games in all competitions.
Ejuke levelled matters in the 73rd minutes after dribbling past Dirk Abels before slotting the ball past goalkeeper Ariel Harush.
Six minutes later, he completed his brace in similar fashion to send the Castle Lords home with their heads bowed low.
The goal was the Nigerian’s sixth of the season as the Super Frisians are seventh with 21 points after 13 league outings.
Ejuke will be hoping to add to his goals when his team travel to third-placed PSV Eindhoven in their next Eredivisie on Sunday, November 24.