Caramel Brownies - make a box mix of brownies, spread half in the pan and layer with your favorite caramel chocolates (like ghiradelli caramel squares, dove caramel chocolates.) then spread on the rest of the brownie batter and bake.
Apple Streusel Cheesecake - One of the best desserts ever. Rich but not overly sweet. Pie crust, rich cheesecake, topped with apple streusel. It's delicious, not much of a mess, and will seriously impress.