Prepare brownie mix according to package directions, adding walnuts. Spoon half of mixture into a greased 13- x 9-inch baking pan. Place caramel patties in an even layer over the mixture. Spoon remaining batter over candies.
Bake at 350° for 30 to 35 minutes or until done. Cool on a wire rack. Cut into squares.
*In testing we used See's milk chocolate-covered caramel patties. They may be ordered from See's Candies, P.O. Box 93025, Long Beach, CA. 90809-3025, 800-877-7337.
One (8-ounce) package of Rolo chewy caramels in milk chocolate could also be used in this recipe.