Sieve the flour and powdered sugar or sugar into a bowl. Add the egg yolks and the whole egg. Mix with milk and cream (ratio as desired) to form a smooth pancake batter. Add the grated lemon zest or lemon juice.
Melt the butter in a pan, just let it turn light brown, do not sizzle. Mix slightly cooled into the batter. If there are small lumps, you can pass the dough through a sieve. Let rest for about 5-10 minutes.
Then bake the pancakes in the same pan until golden brown. You no longer have to put butter in the pan for baking.