Step 1

Preheat oven to 350°F

Step 2

In a large bowl, cream together the butter, sugar, and vanilla until very creamy.

Step 3

In a separate bowl, mix the cornstarch and flour.

Step 4

Add about a third of the flour mixture into the sugar mixture and beat well. Add about half the remaining mixture and beat again.

Step 5

Finally, add the remaining flour mixture and beat until the texture resembles whipped cream. This takes about 2 minutes.

Step 6

Drop by rounded tablespoons onto an ungreased cookie sheet.

Step 7

Bake for 15 minutes, until the bottoms begin to turn a very light brown. The tops and sides will remain white. Do not overbake.

Step 8

Cool on the cookie sheet for about 10 minutes before transferring to a cooling rack.