Marshmallows and Chocolate
This is a delicious, simple, and cost-effective (for lack of a better word) option for a dessert. Have a huge pack of marshmallows at the ready. Then, you can either buy some molten chocolate, or actually melt chocolate bars by heating them. At dessert time, serve your guests, a plate of marshmallows, with a small bowl of choco-dip, to, well, dip in and eat.