Whisk the sourdough starter with most of the flour. Cover and leave at room temperature overnight.
The next day, whisk in the remaining flour and other pancake ingredients to make a stiff batter – about the consistency of thick custard. You can leave out the baking powder, but it will result in denser pancakes.
Melt a small amount of butter in a frying pan, over a medium-high heat. Pour in spoonfuls of batter to form circles about 10–15 cm in diameter. Cook for a few minutes until set on top and lightly browned underneath.
Use a spatula or fish slice to turn the pancakes over and cook for a few minutes more until lightly browned on the other side. Remove from the pan and keep warm while you make more pancakes with the remaining batter.
Baker’s Tip: You can also make French crêpe-style pancakes from leftover starter. Simply whisk together 400g/14oz sourdough starter of any type, 1 egg and ¾ tsp fine/table salt. Melt a small amount of butter in a frying pan over a medium-high heat. Pour in just enough batter to coat the bottom of the pan thinly and swirl it around. Cook for a few minutes until set and lightly browned underneath. Using a spatula or fish slice, flip the pancake over and cook for a few minutes more on the other side. Serve at once with your favourite topping, or reserve under a clean cloth while you make more pancakes from the rest of the batter in the same way.