To make your own dulce de leche take a 14 oz can of sweetened condensed milk. Remove the label. Place the UNOPENED can in a tall stock pot (you can do 3 or 4 cans at a time). Cover with water to about 2 inches above the can. Cover the pot. Bring to a boil and then reduce the heat to low and simmer. Simmer for 3 to 3 1/2 hours. Let the can cool before opening. So the recipe calls for 300 ml which is 10.14 ounces. So I removed 2 tablespoons from the can of homemade and then used that 2 tablespoons for topping on the cake so worked out great!