Step 1

Mix the flour, baking powder, bicarbonate of soda, salt and sugar together in a bowl. Add the egg yolks and a splash of milk and stir until it forms a thick paste. Add the rest of the milk and kefir and mix well.

Step 2

Whisk the egg whites in a separate bowl to stiff peaks. Fold them carefully into the batter.

Step 3

Heat a non-stick frying pan (or ideally a cast iron frying pan) over a medium heat and add 1 tablespoon melted butter. Brush the butter around the base of the pan and pour any excess into a small bowl.

Step 4

Pour in rounds of the batter that are around 9cm/3½in wide. Cook the pancakes on the first side for about 2 minutes until a few tiny bubbles start to appear on the surface and the edges look a little set.

Step 5

Flip the pancakes really gently and cook for a further minute or so, until nice and golden on both sides.

Step 6

Repeat with the remaining batter. Keep warm or serve immediately.