This super quick and easy-to-prepare rompope atole will become one of your favorite recipes to prepare during a cold day. Rompope, also known as Mexican eggnog, is a variation of Spanish eggnog and was created by nuns in Puebla during colonial times. You don’t need much to prepare this sweet and warm rompope atole, just combine condensed milk, rompope, milk, rice flour, and cinnamon, and you are ready to go!