How to Make It
Simmer raspberries with 1 cup water until the fruit releases juice, 5 to 10 minutes. Strain, pushing on berries with a spoon, then discard seeds and pulp.
Pour juice through a coffee filter while still hot, then mix with sugar, stirring to dissolve; chill.
The Bar Book: Elements of Cocktail Technique (Chronicle Books; $30). Clyde Common