Prepare an 8x8 square baking dish by lining it with aluminum foil or parchment paper and buttering.
Place sweetened condensed milk in a medium saucepan and heat over medium heat stirring constantly until heated through. (do not boil)
Add in white chocolate chips and continue stirring until the chips are completely melted.
Add in brown sugar, molasses, and spices continue heating over medium-high heat until the sugar is dissolved and spices are well incorporated, about 10 minutes. Make sure to dissolve the sugar or the texture of the fudge will be grainy.
Pour fudge mixture into your prepared pan and spread sprinkles evenly across the top.
Place in the refrigerator for at least 4 hours or until set completely.
Cut into 16 pieces and serve.
Store refrigerated in an airtight container.