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!