1 (18.25 oz) pkg. Pillsbury Moist Supreme Butter Recipe Cake Mix
1/3 C Oil
1 (12 oz) pkg. (2 cups) semi-sweet chocolate chips
3 (1.4 oz) chocolate-covered toffee candy bars, cut into pieces
½ C butter or margarine
32 vanilla caramels, unwrapped
1 (14 oz) can sweetened condensed milk (not evaporated)
Heat oven to 350. Grease 13x9 pan. In large bowl, combine cake mix, oil and eggs; blend well. Stir in chocolate chips and candy bar pieces. (Mixture will be thick) Press half of mixture in bottom of greased pan (lightly coat hands with butter to prevent batter from sticking to hands). Bake at 350 for 10 minutes.
Meanwhile, in medium saucepan, combine butter, caramels and sweetened condensed milk. Cook over medium-low heat until caramels are melted and mixture is smooth, stirring occasionally. Slowly pour caramel mixture evenly over partially baked crust. Top with remaining cake mix mixture.
Return to oven; bake an additional 25 to 30 minutes or until top is set and edges are deep golden brown. Cool 20 minutes. Run a knife around sides of pan to loosen bars. Cool 40 minutes. Refrigerate 1 hour. Cut into bars. Store in refrigerator.