Line a 9X9 pan with parchment paper and set aside.

Place 9 oz of the white chocolate chips in a microwave safe bowl. Then place the milk chocolate chips and remaining white chocolate chips in a separate microwave safe bowl.  Top each bowl with 1 tablespoon of butter and half of the sweetened condensed milk.

Microwave each bowl on high for 30 seconds. Stir well.

Continue to microwave in 30 second intervals, stirring after each interval until the chocolate chips are melted.  Be careful not to over cook.

Stir in 1 teaspoon of the vanilla extract into each bowl.  Add red food coloring to the milk chocolate chip bowl a little at a time until it’s a vibrant red color.

Drop spoonfuls of each of the red and white mixture into the prepared pan so that they look patchwork.  Keep adding until all the mixtures are used.

Take a knife and swirl the fudge so that the red and white mixtures are swirled together.

Refrigerated for an hour or until completely hardened.

Lift the parchment paper out of the pan and cut into cubes.