While it bakes, you can sip on a special holiday brew.
In saucepan, bring brown sugar, butter, and syrup just to boil. Pour into greased 9-by- 13 inch baking dish. Top with bread, overlapping slices slightly. In bowl, whisk eggs, half-and-half, bourbon, vanilla, and spices; pour over bread. Top with raspberries. Cover; refrigerate overnight. Bake French toast, covered, at 375° for 15 minutes. Uncover; bake until custard is set in center and top is golden, about 20 minutes more. Dust with confectioners’ sugar.