01 - Whisk together the flour, sugar, baking powder, baking soda, and salt in a large bowl.
02 - In a separate bowl, combine the ricotta, egg yolks, milk, melted butter, lemon zest, lemon juice, and vanilla extract; whisk until smooth.
03 - Gently fold the wet ingredients into the dry ingredients until just combined, avoiding overmixing.
04 - Beat the egg whites until stiff peaks form, then fold them carefully into the batter in two additions to maintain aeration.
05 - Heat a nonstick skillet or griddle over medium heat and lightly grease with butter or oil.
06 - Pour approximately 1/4 cup batter per pancake onto the skillet. Cook for 2 to 3 minutes until bubbles appear and edges set, then flip and cook an additional 1 to 2 minutes until golden and cooked through.
07 - Continue cooking remaining batter, greasing the pan as needed between batches.
08 - Serve pancakes warm, accompanied by maple syrup, fresh berries, and a dusting of powdered sugar if desired.