Melt the butter and set aside to cool a bit.
Whisk all ingredients together, add the butter. Continue to whisk until you have a smooth batter. Leave for 20-30 minutes before using (give it a stir before using).
Heat up your waffle iron on a high setting. Add a ladle of batter and press down to make your first waffle. If it common knowledge that the first waffle never turns out well so don't worry about it.
Once the waffle is golden brown, remove and serve immediately. Don't stack them or they will go soft really quickly.
Serve with jam of your liking - we love cloudberry jam, strawberry and raspberry jam. Norwegians love sliced brown cheese on the warm waffles, too. Delicious.