Melt butter in a saucepan

Mix in condensed milk. Put into high heat. Keep stirring.

When it comes to a slight boil, turn the heat to low and add in the egg yolks and nuts.

Keep mixing until the mixture gets sticky. (like a dough)

Turn off the heat and let it cool. Form it into balls, put it in a wax paper to prevent sticking.

be creative, freeze for a while then serve. (sorry no pics yet)