First of all make the ganache. For that melt butter & chocage in bowl. You can do this in double boiler or microwave oven.

Mix all the ingredients to this to make a soft dough.

Add chocolate choos to this and milk to bind and make a soft dough. Do not over knead the dough.

Then make the equal size of the balls, flatten it slightly.

Bake in it preheated oven at 170 degree c for 10-15 mins

You can also add nuts. I used almonds.