Whenever I want a delicious treat and don't want to run to the store to pick up odd ingredients, I make toffee at home. This comes together pretty quickly, and would be a good recipe for an older kid to help with (I'd probably wait and let them spread the chocolate on rather than letting them handle the molten sugar). This also makes for a pretty gift, if you feel like sharing.
2 cups sugar
2 cups unsalted butter
1/4 tsp salt
2 cups semisweet chocolate chips
First, line a baking pan with tin foil. In a shallow, heavy pan, heat the sugar, butter and salt over medium heat. Stir very often with a wooden spoon until the molten sugar turns a dark amber, or if you have a candy thermometer, until it passes the 300 degree point. Once you reach that stage, pour the mixture into your lined baking pan, tilting the pan a little to get the mixture to spread out a bit. Next, pour the chocolate chips evenly across the hot toffee mixture, and using a second spoon, spread the melting chocolate over the surface of the toffee. Some people like to add chopped nuts to the chocolate at this point, so fee free. Refrigerate the pan for an hour or so, until the toffee has completely cooled. Break the toffee into bite-sized pieces and enjoy.
You could also toss plain popcorn with the hot toffee mixture rather than pouring it into a pan, if you wanted to live life in the fast lane.
What's your favorite quick dessert?