I found a recipe for "lemon squares," made with eggs, baking powder,
sugar, butter, lemon rind, lemon juice, and pastry flour. One is
supposed to combine butter, flour, and some sugar in a cooking tray and
bake 18 minutes. The other ingredients, along with some sugar, are
mixed together, and then spooned on top of the baked stuff, and then
it's baked again. I don't know if there is a mistake in the recipe,
because why would one combine the topping ingredients with the baking
powder? Wouldn't the baking powder go with the flour and baked
initially? Or does the baking powder seep into the flour/butter/sugar
stuff and help it rise a little one the second baking?
Thanks in advance.