Alexandra Guarnaschellis Indian Pudding

Name: Alexandra Guarnaschelli's Indian Pudding
Ingredients: 3 cups whole milk; 4 tablespoons (1/2 stick) unsalted butter, plus more for greasing the dish; 1/2 cup coarse cornmeal; 2 tablespoons all-purpose flour; 3/4 teaspoon kosher salt; 1/4 cup blackstrap molasses; 2 large eggs; 1/4 cup sugar; 1/2 teaspoon ground cinnamon; 1/2 teaspoon grated nutmeg; 1/4 teaspoon ground allspice; 1/2 cup golden raisins; 1 1/2 cups unsweetened whipped cream or ice cream, for serving