This Low Calorie Horchata is just 47 calories per 1/2 cup. Served over ice this is a large serving, so be sure to use a tall glass to serve. I cut down the calories and sugar by using Keto Maple Syrup, but you could swap out out for pure maple sirup if you prefer. Special Tip: The key to making a great healthy horchata is the straining. So be sure to use cheesecloth to get all the chunks of rice out before serving.