Heat oven to 375°F (350°F for dark pans). Grease bottom and sides of 13x9-inch pan.
If using crescent rolls: Unroll dough into 2 long rectangles. If using dough sheet: Unroll dough. Place in pan; press over bottom and 1/2 inch up sides to form crust. Bake 5 minutes.
Remove partially baked crust from oven. Sprinkle vanilla chips, chocolate chips, almonds and cashews evenly over crust. Pour condensed milk evenly over top.
Return to oven; bake 20 to 25 minutes longer or until golden brown. Cool 10 minutes. Run knife around sides of pan. Cool 1 hour. Refrigerate about 30 minutes or until chocolate is set. For bars, cut into 9 rows by 4 rows.