AKA: Chocolate Caramel Shortbread Squares FOR THE CRUST
1 cup all-purpose flour, spooned into measuring cup and leveled-off
1/4 cup dark brown sugar
2 teaspoons cornstarch
1/4 teaspoon salt
1 stick (1/2 cup) cold unsalted butter, cut into 1/2-inch cubes
1 tablespoon ice water
1 large egg yolk
FOR THE CARAMEL LAYER
1 (14-oz) can sweetened condensed milk
1/2 cup dark brown sugar
6 tablespoons unsalted butter
2 tablespoons golden syrup (such as Lyle's Golden Syrup) or dark corn syrup
1 teaspoon vanilla extract
Generous pinch salt
FOR THE CHOCOLATE LAYER
6 ounces semi-sweet chocolate, broken into small pieces, best quality
3 tablespoons heavy cream
 Complete Intructions from Once-Upon-A-Chef |