Ice Cream Profiteroles with Bittersweet Chocolate Sauce

Name: Ice Cream Profiteroles with Bittersweet Chocolate Sauce
Cuisine: European, French, Mediterranean
Ingredients: 1/2 cup water; 1/2 cup milk; 1 stick (4 ounces) unsalted butter, cut into tablespoons; Large pinch of coarse salt; 2 tablespoons sugar; 1 cup all-purpose flour; 4 large eggs; ⅓ cup brown sugar; ¾ cup heavy cream; 4 ounces bittersweet chocolate, chopped or broken into small chunks; 2 tablespoons unsalted butter; 2 tablespoons Grand Marnier (optional)