Pack a rimmed baking sheet with snow and place in freezer (or outside, if temperature is low enough). Meanwhile, bring syrup to a boil in a small saucepan with a candy thermometer clipped onto it; cook until thermometer registers 240 degrees. Carefully pour syrup into a liquid measuring cup and let cool about 5 minutes.

Drizzle syrup in a few 6-inch lines across snow. Let set 25 to 30 seconds (they should be cool and firm, but not hard). Place a 9 1/2- inch skewer or dowel, or an ice-pop stick, at one end; roll up taffy around skewer. Repeat with remaining syrup and snow. Eat immediately, or store, frozen in a single layer in an airtight container, up to 2 days.