Place both ingredients in microwave safe container, I used a 2-cup measuring cup. Microwave on high for 30 seconds. Stir. Microwave again for 30 seconds or until all chocolate has melted.
Let cool. Place in a squeezable plastic bottle, like an old ketchup or mustard bottle, or in an easy-pour pitcher until ready for use.
When ready, just pour slowly over ice cream, if you like, you can quickly add chopped nuts or sprinkles and watch it harden almost instantly.