15 Minute Caramels

From http://www.howdoesshe.com/15-minute-holiday-caramels/

Ingredients:

1 cup butter
1 cup brown sugar
1 cup sugar
1 cup corn syrup
1 can sweetened condensed milk
Large microwave safe glass bowl (at least 10 cup capacity)
Wax paper

Melt the butter in a large glass bowl.
Add all ingredients except milk and stir well.
Add milk and stir.
Microwave on high for 13 minutes. 
To be safe, put a plate under your bowl in case it starts to boil over.
Remove from microwave and stir again.
Pour hot caramel into a buttered 9×13 pan and allow to cool.
Cut into 1″x1″ squares and wrap in wax paper.