Add the flour, butter, powdered sugar, cornstarch
and vanilla to a deep mixing bowl.
Begin mixing the ingredients using electric
beaters at a low speed. Once the dry ingredients
begin mixing with the butter and not dusty
anymore, increase the speed to medium. If you
increase the speed too soon you will have flour
all over the place. LOL.
A few minutes later, the dough will start to look
like sand. Keep beating the dough and it will
start to come together.
Once the dough comes together increase the speed
to high and beat the dough until it resembles
thick whipped cream.