I often buy a carton of buttermilk for a recipe but only need a little. I freeze it and when it is thawed it looks most unpromising - water with some solids on the bottom of the carton. Pour into a processor and give a short whiz.
2 eggs separated
1 cup buttermilk
30g butter, melted
150g plain flour
¼ tsp salt
½ tsp bicarbonate of soda
Extra butter for cooking
500g assorted berries
50g unsalted butter
1 Tbsp castor sugar or to taste
Beat egg yolks well, then whisk in buttermilk and melted butter.
Sift dry ingredients over egg mixture and fold in. When you are ready to cook pancakes, whisk egg whites to soft peaks and fold into batter. Lightly grease a heavy-based frying pan and ladle in about ¼ cup batter.
Cook until bubbles form on uncooked side. Flip with a wide spatula and cook other side. Transfer pancakes to a low oven.
Topping Heat butter and sugar in another frying pan. Whilst butter is foaming, drop in the berries. Reduce heat to moderate and cover the pan for about 5 minutes. Uncover. The juices should be flowing and the berries softened without losing too much of their shape. Spoon generously over the pancakes.
Serve with thick yoghurt or mascarpone.