It really couldn't be any easier. A can of sweetened condensed milk. This is the brand I had already in my pantry. I wonder if different brands taste different?
Put it in your crock pot and cover it with water. Put the lid on and turn it to low for three hours.
That. Is. It.
Then you put it into a cute little jar to store in your fridge.
It's rich and creamy, but oh so easy.