Step 1: Preheat oven to 350° F. Combine cake mix and nuts in large bowl. Stir in 2/3 cup evaporated milk and butter (batter will be thick).
Step 2: Spread half of batter into ungreased 13 x 9-inch baking pan. Bake for 15 minutes.
Step 3: Heat caramels and remaining evaporated milk in small saucepan over low heat, stirring constantly, until caramels are melted.
Step 4: Sprinkle morsels over brownie; drizzle with caramel mixture.
Step 5: Drop remaining batter by heaping teaspoon over caramel mixture.
Step 6: Bake for 25 to 30 minutes or until center is set.
Step 7: Cool in pan on wire rack.