Whisk together the flour, sugar, baking powder and salt in a large bowl.
In a separate bowl, whisk together the milk, ricotta, eggs, and vanilla. Add to the dry ingredients and stir just until combined. It's okay if there's a few lumps. Let rest a few minutes.
Heat a large skillet over medium heat. Melt a Tablespoon of butter on the pan. Then use a 1/4 cup to pour the batter onto the pan. Flip once there are bubbles on top and the edges are lightly browned. Then cook the other side and addition 2 minutes.
Repeat to cook the rest of the pancakes. Turn the heat to medium-low if they are browning too fast.
Serve hot with butter and maple syrup.
Variation: For lemon blueberry ricotta pancakes, add the zest from 1 lemon and 2 Tablespoons lemon juice. Then add in about 3/4 cup blueberries.