Place the irish cream and chocolate chips in a saucepan and heat on low.

Stir to mix evenly and then add the heavy cream and egg yolks,

Stir until blended well.

Remove from heat.

Refrigerate overnight.

Use a candy scooper or teaspoon to scoop, and use your hands to form balls.

Coat with cocoa powder and place on a cookie sheet and refrigerate again to harden into balls.