Preheat oven to 150'C / 300'F / gas mark 2, line a roasting tin with parchment paper.
Whisk the egg yolks and caster sugar together.
Heat the cream up a little bit over a gentle heat, DON'T boil it! Otherwise you'll have scrambled eggs.
Slowly pour the cream into the egg yolks. Keep whisking as you go. Otherwise you'll have scrambled eggs!
Divide the mixture into 4 ramekins. I used the big ones which holds 150ml, so if you have small ramekins you might have to adjust a bit.
Put the ramekins in the roasting tin, pour warm water into the tin so it comes up to halfway of the ramekins. (A bain-marie, baby!)
Put it in the oven carefully for 35 - 40 min, it should be slightly wobbly in the middle.
Remove from the oven and leave to cool on a rack.
Get your grill on, sprinkle your brûlées with the brown sugar and put them on a baking sheet.
Put them under the grill for 2 or 3 minutes until you have the brûlée caramelised top!