Chocolate Chip Shortbread Cookies

I'm always on the lookout for new shortbread recipes. Much like my quest for the perfect corn spoon bread recipe that recreates the old Annie's Santa Fe spoon bread, I think that I'm trying to replicate something that I've had once before. I've had fantastic shortbread, but it's never exactly right. This one is decent, but again, not the droid I'm looking for.

Chocolate Chip Shortbread Cookies

1 cup butter, softened
1/2 cup brown sugar
1 tsp vanilla
2 cups flour
1/4 cup cornstarch
1/2 cup mini chocolate chips
1 Tbsp sugar

1- Preheat oven to 300 degrees.
2- Mix butter, brown sugar and vanilla together until fluffy. Gradually blend in the flour and cornstarch. Add chocolate chips.
3- Form into 1" balls and place on an ungreased cookie sheet. Pour sugar into a small dish, dip the bottom of a drinking glass in sugar and lightly press down on each ball to flatten.
4- Bake for 25 to 30 minutes until the bottoms begin to brown.
5- Cool for 5 minutes, sprinkle additional sugar on warm cookies if desired and remove to a rack to cool completely.