Preheat an electric griddle to 375 degrees F, or place a non-stick skillet over medium to medium-high heat on the stovetop.
In a small bowl, whisk the flour, baking powder, salt, lemon zest, and sugar until combined.
In a large mixing bowl, whisk together the ricotta cheese, eggs, milk, and lemon juice until smooth. Dump the dry ingredients into the wet and mix until just combined. Be sure not to overmix.
Grease the hot griddle (or skillet) with butter or non-stick cooking spray. Pour 1/4 cup of batter per pancake onto the griddle.
Allow the pancakes to cook until bubbles form on top, and the bottom is golden brown. Flip the pancake and cook until the other side is golden brown. Repeat until all the batter has been used.