2. Bring it to boil.
3. Place the unopened condensed milk tin inside the water and let the water boil for 3 hours.
4. The tin should be immersed in water for the whole time, otherwise it will burst. So be careful.
5. After 3 hours, remove the tin from the water and allow it to cool.
6. Open the can and dulce de liche is ready. Prepare it a day before making the pie to reduce work load.