Preheat the oven to Fan Oven 175°C/350°F/Gas Mark 4
Line a square cake tin with grease proof or parchment paper
Cream the butter (melted) and sugar
Mix the eggs and vanilla to the sugar and butter
Melt the chocolate ( not the chips)
Let the chocolate cool (just a little so it doesn't ruin the eggs)
Mix the chocolate in
Add the flour, cocoa powder and pinch of salt
Add the chocolate chips
Bake for 25 minutes in a preheated oven.
Check with skewer to see if it is baked. If it comes out wet but without mixture attached it is baked. If it is still sticking to the skewer it is not ready yet. Watch it carefully if you choose to bake for any longer than the recipe states, as it can get hard very quickly and you don't want that! They should be moist and fudgy. Enjoy!