Start by placing the condensed milk into a large aluminum baking tray.
Cover the baking tray with a sheet of aluminum foil and seal it well.
Next, transfer it to a larger baking tray and add water until it almost covers the entire inner baking tray.
If you’re using aluminum trays like mine, you must also add a little white vinegar. This will prevent the aluminum from oxidizing and the tray from darkening.
Take it to a preheated oven at 180° C (350° F) and bake for 2 hours.
After this time has passed, remove it from the tray and transfer it to a large bowl.
Next, with the help of an electric mixer, beat everything very well for 5 minutes.
Finally, transfer to nice serving containers with lids and close them.
Place them in the refrigerator and let them chill for at least 1 hour.
Serve.