Heat oil in large skillet over medium-high heat. Add onions, sugar and salt and cook, stirring often, until golden brown, about 20 minutes. Remove from heat and stir in Worcestershire sauce and the TABASCO® Chipotle Sauce. Transfer to a bowl and cool completely. Add sour cream to onion mixture and stir until well combined. Refrigerate for at least 2 hours.
*If you prefer a slightly less sweet onion flavor, use yellow onions in place of the Vidalia onions.
Makes 3 cups.