Sift in the flour, then add the sugar, salt and yeast. Pour in the milk and stir to combine.
Cover the bowl with cling film or a tea towel and place in a warm spot. Leave the mixture for about 45 minutes or until bubbly and doubled in size.
Heat a little oil in a medium frying pan over low heat. Add a ladle of batter and fry until the top of the pancake begins to bubble, then flip it over and cook until both sides are golden brown.