Did you mean dulce de leche? 1 cansweetened condensed milk
Remove the label from the can of condensed milk. Do not under any circumstances open the can yet. Take the can and stick it in a pot. Cover it with water. Put the pot on a stove and turn up the heat. Let the pot and can simmer gently for about one and a half to two hours for runny dulce de leche, or up to four hours for solid dulce de leche. Add more water, as necessary, when the level boils down too much.
When it's done, let it cool for a while, and then carefully open up the can and eat directly (for the solid variety) or use as a dessert spread (for the liquid variety).
The resulting product should be colored tan or brown.
NOTE: You need to keep a close eye on the can. If it shows any signs of expansion, immediately remove it from the heat and let it cool. If you are concerned at all at the high-pressure nature of the recipe, you may poke a small hole in the top of the can, and lower the water level so that the can is not completely covered. This will allow the internal pressure of the can to be released, but it will also make the recipe take longer (since high pressure reduces cooking time).
You can also make it in a pie pan in the oven ,Oven method: Pour 1 can sweetened condensed milk into 9-inch pie plate. Cover with aluminum foil; place in a larger shallow pan. Fill larger pan with hot water. Bake at 425 for 1 hour or until thick and caramel-colored. Beat until smooth. That is what I did .Hope this helps:)