In a bowl, mix; flour, salt, eggs and 3 dl milk.
Add the last 3 dl milk to the bowl and mix.
Put a plate on stove on high heat and heat up the skillet.
Add some butter in the skillet and fill the bottom as it melts.
Put the plate on the stove on medium heat.
Mix the pancake mix so it become homogeneous.
Add approx 1 dl pancake mix to the skillet.As it fries approx 40 sec, a thin cake will form.Flip it the cake and fry it on the opposite side for approx 40 sec.Make sure the everything goes from liquid to solid. Move the finished cake to second non heated plate.
Repeat with another scoup of pancake mix.