Mark Bett and Jordan Missin scored the goals as White Star completed the double over the defending champions to preserve their unbeaten league and cup record this season.
White Star keeper Mark Bowers had a surprisingly quite evening, with just the occasional cross to cut out from a disappointing Bowling attack.
Buttershaw always looked dangerous and it came as no surprise when Bett opened the scoring after 28 minutes as he fired home from a cross.
The hosts continued to dominate in the second half and Missin made the game safe six minutes from the end when he beat Bowling keeper Ashley Onitari to a through-ball and fired home.
The rival teams will now contest two knockout finals this coming week, in the League Senior Cup over the weekend and then next Thursday in the Bradford & District FA Sunday Senior Cup.