Spirits La Rosita Be the first to rate & review! Cocktail historian Gary Regan (of Regan’s bitters) rediscovered this drink when a friend asked him about its origin. While researching the recipe, Regan realized that he himself had written it up in his 1991 book, The Bartender’s Bible. Slideshow: Tequila Cocktail Recipes By Gary Regan Updated on June 7, 2021 Print Rate It Share Share Tweet Pin Email Total Time: 5 mins Yield: 1 drink Ingredients 1 ½ ounces reposado tequila ½ ounce dry vermouth ½ ounce sweet vermouth ½ ounce Campari dash of Angostura bitters Ice Directions In a mixing glass, combine the tequila, vermouths, Campari and bitters. Fill two-thirds of the mixing glass with ice and stir well. Strain into a chilled martini glass. Rate it Print