This fast and fun recipe is a delicious chocolate sauce and when you put it on something cold, it turns hard like commercial "Magic Shell" (except a lot more budget friendly). Don't restrict it to ice cream though, how about frozen bananas?
1 cup semi-sweet chocolate chips
¼ cup butter
¼ cup canola oil
¼ teaspoon vanilla extract
Heat the chocolate, butter and oil until the chocolate melts. I do this in the microwave, starting at 30 seconds on high, then stir, then 15 more seconds and stir and a final 15 seconds and stir. At first, it will seem like the ingredients don't want to blend, but whisk it for 10-15 seconds and it will go together beautifully. Once it is smooth, whisk in the vanilla extract.
Cool to room temperature, (you can use it right away, but while it is still hot it will take a few seconds for it to harden on the ice cream).
NOTE: If you use your microwave to melt the chocolate, watch it carefully, since your microwave might cook faster or slower than mine and chocolate scorches easily.
NOTE: With the addition of butter & oil, I thought this might have a greasy taste, but it does NOT. While warm (which is my favorite) this has a velvety texture, almost like the best hot fudge sundae taste.