Keep the cake mix dry; do not add eggs, water, or oil to maintain a crisp, cookie-like topping., Use real salted butter for best flavor and browning; margarine is not recommended., Halve caramels before adding to help them melt evenly and spread throughout., If caramels are very firm, soften by microwaving briefly before cutting., Scatter butter pats evenly to ensure golden, buttery crust., Monitor baking closely toward the end to prevent burning; cover with foil if necessary., Allow cake to cool before serving to help caramel set for easier scooping., Serve warm with vanilla ice cream, warm caramel sauce, whipped cream, or chopped nuts like pecans or walnuts for added texture and flavor., This dessert can be assembled up to 24 hours ahead and refrigerated before baking; add extra baking time if chilled., Leftovers can be stored covered at room temperature or refrigerated up to five days., Reheat individual portions in microwave for 20–40 seconds or whole dish in oven at 325–350°F for 10–15 minutes., Gluten-free variations possible by substituting gluten-free cake mix., Alternative cake mix flavors like spice or white cake can be used., Fresh apples can replace canned filling if pre-cooked with sugar and a thickener like cornstarch or flour., Caramel bits or light caramel sauce can substitute wrapped caramels but use sparingly to avoid sogginess., Baked leftovers can be frozen for 2-3 months; thaw in fridge before reheating., Smaller pans or individual ramekins may reduce baking time by 5–10 minutes.