Pear Moscow Mules

Note: Makes 1 cocktail, and about 11/2 cups pear simple syrup (enough for 12 cocktails)

To make the simple syrup: In a medium saucepan, bring water, the brown sugar, pear and ginger to a simmer over medium-high heat, stirring until the sugar is dissolved. Decrease the heat to a gentle simmer for 30 minutes. Remove the pan from the heat and allow the syrup to cool to room temperature. Strain the syrup through a fine-mesh sieve. Refrigerate until well chilled. (It will keep in the refrigerator for at least 10 days.)

To make the cocktail: Fill a copper mug or cocktail glass with ice. Add the vodka, simple syrup, and lime juice and stir. Top with enough club soda to fill the glass. Garnish with the pear slice, cinnamon stick and rosemary sprig and serve.