Creamy Double Decker Fudge

I made batch #1 of this today... I will be making one more to have enough to take to my DAR cookie exchange next week. It's Easy, pretty quick, and tastes YUMMY!

Ingredients:
1 Cup Peanut Butter Chips
1 Cup Chocolate Chips
1 (14 oz) can Sweetened condensed milk (divided)
1 tsp Vanilla (divided)

Directions:
Line an 8 inch square pan with foil (or 13x9 if you are doubling). In a microwave safe bowl, combine the peanut butter chips with 2/3 cup of the sweetened condensed milk. Microwave for 60 to 90 seconds, stirring after 1 minute, until chips are melted and mixture is smooth when stirred. Add 1/2 tsp vanilla, stir, and pour into prepared pan. Smooth out to cover bottom of pan. Repeat the procedure for the chocolate chips and pour chocolate over the peanut butter layer. Spread so that chocolate is even. Cover and chill until the fudge is firm. Cut into 1 inch squares, cover and store in the refrigerator.