Condensed milk is made by heating milk until most of the water content has evaporated, leaving behind a thick, creamy liquid. It's like a superpower for your desserts, adding a rich, velvety texture that's hard to replicate. But what if you don't have any on hand?
Well, you could try using milk as a substitute, but it's not going to be the same. Regular milk is much more liquid and lacks the intensity of condensed milk. It's like trying to make a latte with water instead of espresso - it just won't have the same oomph.
That being said, if you're in a pinch, you can try making a fake condensed milk by heating milk with some sugar and butter until it thickens. It's not the real deal, but it'll do in a crunch. Just don't expect it to be as rich and creamy as the genuine article.
Can You Substitute Evaporated Milk For Condensed at Jimmy Ashman blog