Here's an easy-peasy chocolate ladoo recipe from Rekha Vishwanath Nayak, who posted it on a social networking site.
50 g butter (I used 1/4 cup)
1/2 cup cocoa powder
1 tin (400g) milkmaid [or any other condensed milk]
3/4 cup powdered sugar (add more for more sweetness)
Dry fruits (optional, I did not add)
In a deep bottomed pan, melt butter on medium heat. Add all the other ingredients and mix well. Cook for 5 to 7 minutes on medium flame. Keep stirring as you cook, specially the last couple of minutes.
Switch the gas off and allow to cool completely.
Shape into balls.
Note: If you cook the mixture too long it can get dry after cooling so if you are not able to roll them into balls, you can make burfis out of them.
If you cook the mixture for a shorter time, after cooling it may be too soft to roll into balls. Try and roll them into balls anyway and refrigerate them, they will harden in a few hours.
These ladoos taste better after they have set properly so it will be a good idea to make them a few hours or a day in advance.