01 - Toss mixed berries with sugar and lemon juice in a small bowl. Set aside to macerate while preparing pancakes.
02 - Whisk together flour, sugar, baking powder, baking soda, and salt in a large mixing bowl until well blended.
03 - Combine ricotta, milk, melted butter, egg yolks, lemon zest, and vanilla in a separate bowl. Mix until completely smooth.
04 - Add ricotta mixture to dry ingredients. Mix gently until just combined, taking care not to overmix the batter.
05 - Beat egg whites in a clean bowl until soft peaks form. Gently fold whipped whites into batter until fully incorporated.
06 - Heat nonstick skillet or griddle over medium heat. Lightly grease with butter to prevent sticking.
07 - Pour 1/4 cup batter per pancake onto skillet. Cook 2-3 minutes until bubbles form and edges set. Flip and cook 1-2 minutes until golden brown and cooked through. Repeat with remaining batter.
08 - Stack pancakes on plates. Top with macerated berries. Drizzle with maple syrup or dust with powdered sugar if desired.