Take an unopened can of Sweet and Condensed Milk (regular or non fat),
Put it in the crockpot,
Fill the crockpot with water until the can is completely submerged,
Turn it on low for 8 hours,
Open and use for dippin.
Warning! When you open the can, contents will be under pressure, so keep your face/eyes out of the way of any "spitting". I learned that the hard way.