Wanderers were on the front foot for the majority of the first half. Ella Golding was able to capitalise on good build-up from her teammates and put the home side up early.
Kelli Brown was second on the score sheet for Wanderers after using her pace to get past the Onehunga defence and slot the ball past the keeper.
Katie Williams, who was having a strong game, was caught off guard by Onehunga's attack and miss-played a pass which led straight to a goal for Onehunga, allowing them a life line back into the game.
After a nervy second half, Kelli Brown showed her class again, beating two defenders and rounding the keeper from an acute angle and slotting the ball home for Wanderers third.
It was a dream end for Wanderers as Brown was able to play the ball into the box with Michaela Foster slamming home the cross for her first goal for the club.