The eggs are placed in small dishes called ramekins with a knob of butter on top and baked at 180 Â C ( 350 Â F ) until the white is set , but the yolk remains soft , which takes around 15 minutes . The eggs are placed in ramekins with a knob of butter on top and baked at 180 Â C ( 350 Â F ) until the white is set , but the yolk remains soft , which takes around 15 minutes .