Preheat your griddle to medium heat or 275° - 300°℉. (see note)
Whisk together the dry ingredients: flour, sugar, baking powder and soda, and salt.
In a separate bowl, whisk together the buttermilk, ricotta, eggs, vanilla, lemon juice and butter until combined.
Combine the milk mixture to the dry ingredients and mix until just combined. Fold in the lemon zest.
Using a ¼ - ⅓ C measuring cup, pour the batter onto the skillet. Cook until bubbles start to appear and then gently flip over and cook until golden. Serve with a sprinkle of powdered sugar if desired. To keep any cooked pancakes warm before serving, place them in a 200℉ oven until ready to serve.
Notes
All griddles are different, but I prefer to keep the heat slightly lower for these pancakes than I would for regular ones.