all-purpose flour • baking powder • salt • sugar • lemon, for the zest • vanilla extract • large eggs • whole-milk ricotta, squeezed dry with a cheese cloth (liquid can be used instead of the water in the next ingredient) • buttermilk (or 37 grams Greek yogurt + 36 grams water) • unsalted butter, melted, plus more for cooking and serving • Maple syrup, for serving