If your caramel sauce has become too thick, there are a few ways to thin it out to the desired consistency: Add liquid: Adding a small amount of liquid, such as heavy cream, milk, or water, can help to thin out the caramel sauce. Start by adding just a teaspoon or two of liquid at a time, stirring well after each addition, until you reach the desired consistency. Heat the sauce: Heating the caramel sauce can also help to thin it out. Place the sauce in a heatproof bowl or saucepan and microwave it on high in 10-second intervals, stirring after each interval, until it reaches the desired consistency. Alternatively, you can heat the caramel sauce in a saucepan on the stovetop over low heat, stirring constantly, until it thins out. Make a new batch: If your caramel sauce is beyond repair, you can make a new batch and be more careful with the cooking process to avoid over-thickening.