Martha's Fudge

Origin Unknown 

2 cups semi-sweet chocolate chips
11 oz. butterscotch chips
1 14oz can sweetened condensed milk

Mix all ingredients together in a microwave safe bowl and heat on high in 30 second increments until melted.

Stir in 1 tsp vanilla

Line a 9x9 pan with parchment paper.  Pour melted mixture in to the pan and refrigerate until hardened.