Line 8x8 inch pan with foil and spray with cooking spray.
Place unwrapped caramels in large bowl with 1 Tbs. water. Melt according to directions on package, then set aside.
In a 3 quart saucepan, melt chocolate chips and both milks, together over low heat. Stir constantly. This will take about 10 minutes.
Pour the melted fudge into the foil lined pan.
Pour caramel over the top of the fudge and spread evenly over the top.
Run a knife through the caramel and fudge to marble it.
Sprinkle with kosher salt.
Refrigerate 3-4 hours or overnight.
Remove from pan and foil. Cut into squares.
Store in the refrigerator.