Whisk Dry Ingredients: In a large bowl, whisk together flour, sugar, baking powder, baking soda, and sea salt until thoroughly aerated and combined.
Mix Ricotta Custard Base: In a separate medium bowl, whisk together ricotta cheese, egg yolks, whole milk, lemon zest, lemon juice, melted butter, and vanilla extract until creamy and smooth.
Whip Egg Whites (Secret Fluff Hack): In a clean small bowl, whip the 2 egg whites with a hand whisk or electric beater for 90 seconds until soft peaks form.
Fold Batter Gently: Pour the ricotta mixture into the dry flour mixture. Stir with a spatula just until barely combined (do not overmix, lumps are okay!). Gently fold in the whipped egg whites in two additions until light, fluffy, and cloud-like.
Griddle to Golden Perfection: Heat a cast-iron skillet or nonstick griddle over medium-low heat and grease lightly with butter. Drop 1/3 cup of batter per pancake. Cook for 2.5 to 3 minutes until bubbles form on top and edges look set. Gently flip and cook 2 minutes more until golden brown and puffed.
Garnish & Serve Warm: Transfer warm pancakes to plates. Crown with sweet cream butter, fresh blueberries, lemon zest ribbons, and a generous pour of warm pure maple syrup.