Cocktail bitters are a bartender’s salt and pepper. Here’s our guide to B.C.’s best

Aficionados of Old Fashioneds are familiar with oversize-label bottles of Angostura, the classic aromatic bitters from Trinidad and Tobago that have made a million cocktails sing. Signature mixes of botanicals, often originally used as medicine, have earned famous bitters brands like Sazerac, Peychaud’s and Amargo Chunchon (for Pisco Sours) a place in the classic-cocktail canon.