2 Ingredient Fudge

0 Line a baking dish with parchment paper or aluminum foil sprayed with non-stick cooking spray.
1 Set aside.
2 Add the white chocolate chips and frosting to a microwave safe mixing bowl.
3 Microwave at 15 second intervals stopping and stirring between each interval, until  white chocolate chips are completely melted.
4 Stir together until completely mixed.
5 Quickly spread in an 8x8 baking dish. 
6 Top with sprinkles if desired.
7 Chill for  30 minutes to an hour, or until firm.
8 Remove from the pan and cut into squares.
9 Store in refrigerator - fudge is better the second day.