Sweet Potato Fudge

2 cups granulated sugar
1/2 cup whole milk
1/4 teaspoon pumpkin pie spice
1/4 cup mashed cold sweet potato or canned pumpkin
1/2 cup (1 stick) butter, cut up (no substitutions)
1 cup Marshmallow Cr?me
8 ounces white chocolate chips
1/2 teaspoon real vanilla extract

Mix sugar, milk, pumpkin pie spice, sweet potato and butter in large saucepan. Cook to firm ball stage (236 degrees F). Do not overcook!

Remove from heat and stir in remaining ingredients. Stir until firm enough to pour into buttered 8-inch square pan. This fudge sets up very quickly, so have your pan ready. Store in a covered container.