Bitters heavy cocktails are catching on across the country. Some include full ounces of bitters like Angostura making for intensely aromatic experiences. The Zim Zala Bim is no exception with one quarter ounce of Regan's Orange Bitters and delicious reposado tequila.
2 oz reposado tequila
1/4 oz St. Germain Elderflower Liqueur
1/4 oz Regan's Orange Bitters
1/4 oz rich simple syrup
stir ingredients with ice
strain into a cocktail glass
garnish with a large grapefruit zest