How to Make It
Put the ice cream in a food processor. With the machine on and working quickly, add the bourbon and process just until combined. Spread the ice cream in a large, shallow plastic container and freeze until firm enough to scoop, about 20 minutes.
Meanwhile, whip the heavy cream with the vermouth, sugar and bitters until soft peaks form. Refrigerate until chilled.
Pour the cherry soda into 4 tall glasses, filling them two-thirds full. Scoop the ice cream into each glass and top with a dollop of the whipped cream. Garnish with the cherries and serve.