Mix dry cake mix with butter and egg until it forms a soft batter and press into a 9 x 13 baking dish that has been sprayed with cooking oil spray. Flour fingers to keep dough from sticking to your hands.
Toss apples with sugar, brown sugar and cinnamon and place on top of batter.
Sprinkle with pecans and butterscotch chips.
Slowly pour condensed milk overall in a thin stream, covering every section of the pan. Bake at 350.
Add caramels during the last five minutes, just to melt, if they bake too long they will get hard.
Baking time depends on how much liquid the apples have so time will vary.
Check at 30 minutes and then every 5 minutes until cake is brown and set. Mine took 45 minutes. Let cool completely. Cut into squares to serve. Makes 1 9 x 13 cake.