These easy blueberry cocktails are perfect for summer! Make a simple blueberry syrup with fresh berries, sugar, and water (you can also use strawberries, blackberries, raspberries, or peaches!) Then make a simple cocktail with your homemade syrup, a splash of whiskey (or your favorite spirit - it also works with vodka, gin, or nonalcoholic spirits!) and lemon juice. Top it off with some tonic water for an easy, delicious spritzer. Scale these cocktails up for a crowd!