【How-to】How to make caramel with condensed milk

Adding Thickeners to Caramel Sauce. Thicken the sauce with cornstarch. For each cup (240 mL) of caramel sauce that you need to thicken, run 1 tbsp (14.7 mL) of cold water into a measuring cup, and slowly stir in 1 tbsp of cornstarch. Pour the cornstarch mixture into your pot caramel sauce, and stir constantly.