These 10 recipes for homemade hard seltzer are all under 100 calories, and taste just like your favorite storebosugh hard seltzer... But for fewer calories!I like to combine the flavors, for instance... I'll make the blackberry hard seltzer and add in the lime flavor as well. Or combine the cherry and strawberry for an extra sweet cocktail.Try these homemade white claw recipes at home, you'll save money, calories and be able to come up with your own flavors.