Maple Shortbread

Directions

1. 1
   Preheat oven to 350F and put a 9-inch tart pan with a removable bottom in freezer to chill.
2. 2
   Blend butter, brown sugar, 2 tablespoons maple sugar, and vanilla in a food processor just until smooth, about 30 seconds.
3. 3
   Sift flour, cornstarch, and salt over butter mixture and pulse just until clumps form (about 8 pulses).
4. 4
   Press evenly into chilled pan, then sprinkle evenly with remaining 2 tablespoons maple sugar.
5. 5
   Prick all over with a fork and freeze 5 minutes.
6. 6
   Bake in middle of oven until edges are golden, 25 to 30 minutes.
7. 7
   Cool in pan on a rack 5 minutes and, while still warm, cut into 8 wedges.
8. 8
   Cool completely before removing from pan.