Mix the sugar and citric acid together on a small flat plate. Run a lime wedge around the rim of a double rocks glass and dip into the citric sugar mixture to coat.
Build the drink
Fill the rimmed glass with ice.
Muddle the raspberries in a cocktail shaker until broken down.
Add the cranberry juice orange juice, raspberry syrup and lime juice to a cocktail shaker with ice. Shake hard for 15 seconds until well chilled.
Strain into the prepared glass over ice. Garnish with fresh raspberries or raspberry candies on a cocktail pick.
Notes
Cranberry juice: Use cranberry juice cocktail, not 100% pure cranberry juice. Pure cranberry is too harsh and tannic for this drink.
Rim mixture: The citric sugar rim keeps in a small sealed jar for weeks. Make a big batch and it's ready whenever you need it.
Soda water: Optional. It lightens the drink slightly but won't make it noticeably fizzy in a short glass.
Adjusting: Add more raspberry syrup if you want it sweeter, or a little more lime if you want more tartness.
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