Tunn meaning flat, and pannkaka meaning (wait for it) pancakes, tunnpannkaka are thin, unleavened, breakfast treats that I've been eating since childhood and cooking nearly as long. They are tasty and simple, although there's a bit of skill to be gained in the pour. You will see what I mean.
Step 1: Recipe
2-1/2 cups milk
1-1/2 cups flour
Beat the eggs, beat in the milk, beat in the flour. You should have a fairly thin batter, a bit thicker than whipping cream, without many lumps (but some lumps are OK).
That is all. Now the fun part!
Step 2: Pre-heat
Note that the temperature required to cook tunnpannkaka is too hot for butter, you do need to use oil - corn, canola, safflower, etc (olive oil would work but the taste is wrong for this dish).
Step 3: Pour
Scoop up a little less than a cupful. Holding the pan in your left hand, pour the batter quickly into the middle. Rotate the pan so the batter runs around and you get a circular pancake, more or less.