With summer in full swing, many restaurants are adding all-types of milkshakes to their menu, and Denny's is getting in on the fun by adding the Horchata milkshake. The shake is made up of vanilla ice cream, tres leches sauce, and cinnamon sugar, whipped cream, and more cinnamon sugar to cool you off on a hot summer day. This new summer shake is being added to an already extensive lineup of flavors like Cake Batter, Peanut Butter Banana, Chocolate Peanut Butter, and the classic Vanilla, Chocolate, Strawberry, and Peanut Butter. Do you like to have fries with your shake?