In a large sauce pan, combine the sugar, apple cider, butter, cinnamon, and allspice. Cook over medium heat, stirring constantly, until the mixture begins to boil. Allow the mixture to boil for 5 minutes, continue stirring. Remove from heat.
Add in the white chocolate chips and marshmallows. Stir until the white chocolate is fully melted. Stir in the vanilla and toffee.
Spread the mixture evenly into a buttered 8x8 inch pan. Cool completely. Cut into squares.