300mlcan sweetened condensed milk(any size can will work)
water to cover cans
Instructions
Remove labels from cans of sweetened condensed milk (you can cook as many as you have room for, and any size will work!).
Place cans in a large pot and cover with water -- they need to be completely submerged so choose a large pot!
Bring water to a boil over high heat, cover and reduce heat to medium-low. Cook at a low boil for 2.5-3 hours -- 2-2.5 for a lighter, slightly thinner sauce, and 3 hours for a thicker, deeper sauce.
Remove from water and cool completely before storing. Closed cans can be stored up to 3 months at room temperature before using.