Pumpkin Whoopie Pies

For the cookies:

all-purpose flour, spooned and leveled

pumpkin pie spice

baking powder

baking soda

kosher salt

pure pumpkin puree (not pumpkin pie filling)

granulated sugar

packed light brown sugar

canola oil

large egg

pure vanilla extract

For the filling:

cream cheese, at room temperature

unsalted butter, at room temperature

confectioners’ sugar

pure vanilla extract