Chess Pie Bars with Dark Chocolate

for the crust:

1. Preheat oven to 325° F. Spray a 9" square pan with nonstick cooking spray.
2. Combine the flour, sugar, and salt in a medium bowl. With a pastry blender, cut in the butter until crumbly. Then quickly mix with hands until it forms a dough. Don’t worry if it seems a bit dry. Press dough evenly onto the bottom of prepared pan.
3. Bake for 10 minutes. Remove to cooling rack while preparing the filling.

for the filling:

1. Increase oven temperature to 350° F.
2. Stir together brown sugar, sugar, cornmeal, flour, and salt. Add butter, cream, vinegar, and vanilla. Mix well. Then add the eggs and stir well to combine. Fold in the chocolate pieces and then pour mixture into pre-baked crust.
3. Bake for 50 minutes, or until the filling is browned and set. Cool completely on a wire rack. To expedite the chocolate setting up in the bars, you can place the pan in the refrigerator for awhile before cutting.
4. Finish with a light sprinkle of powdered sugar if desired.