Salted Caramel Sauce

"- Keep at room temperature for up to 3 days; refrigerated, about 3 weeks. To reheat, simply place in a microwave safe container and heat for about 45-60 seconds. Stir well. - I have 3 thermometers and they all register different temperatures. In my opinion, it's best to rely on the color of the caramel as opposed to the temperature. You want to look for a dark dark amber color. However, dark amber goes to burnt in a matter of seconds. If using a thermometer, start paying close attention at about 340 degrees. Once the color deepens, pull the mixture from the heat...."