A warm drink consisting of thin gruel, mixed with wine or ale, sweetened and spiced, given chiefly to sick people, especially women in childbed; also to their visitors. First recorded use 1297. (OED, 2nd ed.)
Punch Bowl Spices Recipes, Culpepper
7 egg yolks
Whisk until light and frothy
Cook gently in a double boiler until the mixture thickens, taking care not to let it curdle.