In a large bowl, whisk together the flour, sugar, baking powder, and salt until combined.
In a separate bowl, whisk together the ricotta, milk, egg yolks, lemon juice and vanilla until smooth. Now add the melted butter and lemon zest. Stir to incorporate.
Stir the wet ingredients into the dry ingredients just until incorporated. Don't overmix.
Heat a lightly oiled griddle or skillet over medium heat. Once hot, use a ½ cup measure to scoop the batter onto the griddle.
Cook for 2-3 minutes on the first side until little bubbles strat to form on the surface of the pancake and they are lightly browned. Flip and cook for an additional 1-2 minutes.
Transfer the cooked pancakes onto a plate and repeat with the remaining batter. Keep the cooked pancakes in a warm oven while you cook the rest of the batter.
Serve the fluffy lemon ricotta pancakes warm, with butter, lemon wedges, powdered sugar, traditional maple syrup, or your favorite sweet topping.