One of the most essential bar ingredients a home bar needs—outside of the liquor cabinet—is simple syrup. Many cocktails benefit from a little added sugar to counteract bitterness and acid. Because granulated sugar is tough, if not impossible, to dissolve in cold liquids (especially alcohol), simple syrup becomes the perfect way to add sweetness to a drink.
As the name implies, simple syrup is incredibly easy to make. Combine one part sugar with one part warm or hot water, shake it up to dissolve the sugar, and there you have it! Simple syrup!