The Eagles were unbeaten throughout the month of September, with two wins and a draw putting them in a strong position to continue to push for promotion.
Blanchard led from the front and proved herself the division's standout player, starting all three games and scoring a memorable hat-trick in a remarkable 9-1 victory against Durham.
She also demonstrated her creative threat in the draw against Sunderland, cutting inside and whipping in a superb flat cross for Elise Hughes to glance home.
Blanchard's form has continued into October, finding the net once again as Palace secured a comfortable four-goal win at Blackburn Rovers, before adding a second consecutive home hat-trick against London City Lionesses in a 6-1 victory.
For Player of the Month, she overcame competition from Sunderland's Brianna Westrup, Blackburn's Megan Hornby and Southampton's Katie Wilkinson.