El Diablo is a popular and simple tequila cocktail that is a favorite for many. The sweetness of the blackcurrant-flavored cassis takes some of the bite out of the ginger beer and both fair well with the spiciness of the tequila. It all comes together quite nicely
This is also a fun drink to experiment with. An example would be to use half the cassis in the shaker, build the drink, then drizzle the remaining cassis into the drink over the twists of a bar spoon. You get a purple haze that slowly dissolves and looks neat.