The batter would have doubled - for fluffy Sanna do not stir the batter or it will go flat. Place sufficient water in the steamer (tondor) and bring the water to a boil. Keep ramekins greased and ready. Pour batter into them half full. Place these ramekins into the steamer, cover the lid and steam for 15-20 minutes. Remove the lid carefully so as to prevent the vapour from falling on the Sanna (making the surface slightly soggy) and the steam from burning your hands/face. Carefully remove the ramekins and place them face down on a large plate. Allow to cool (to speed up this process if you need the ramekins for the second batch, place cold wet towels over them to speeden up the cooling process).