How to remove spark plug that is broken?

This is a challenge even for a seasoned mechanic, The easy out idea is the best, If it does not come out with this approach it would be best to pay to have it removed by a shop you trust.

It is odd that the plug broke off in this manner so the cylinder head may have to be removed for the proper repair, I have seen some where the threads pull out of the head and can be repaired with an insert but when the shell of the plug is galled to the threads in the cylinder head so bad the hex breaks of, this is a different ball game.

Sounds as if who ever changed the spark plugs last never heard of wiping Never Seize on the threads. Do as you like but if you're smart the cylinder head should come off and a machinist can dead center counter-bore what's left of the spark plug and easy-out the rest. If you chose to drill the scrap out you'll never center it up properly while dropping scrap down inside the cylinder bore. Of course you know all of this.

first of all make sure you are using a socket made for spark plugs -it will have rubber on the inside to keep the ceramic from snapping. if the ceramics already off just use a short well socket

What are you talking about? It doesn't matter if you broke the ceramic off. You should be able to put a socket on it and turn it

Take it to a machine shop and get it removed there . That way there is less chance of jambing the threads in the head of the motor and you don't want that to happen!

suggest try a easy out

scissors should do trick