01 - Preheat waffle iron according to manufacturer's instructions.
02 - Whisk together flour, sugar, baking powder, baking soda, and salt in a large bowl until well blended.
03 - In separate bowl, whisk ricotta, milk, eggs, melted butter, lemon zest, lemon juice, and vanilla until smooth and creamy.
04 - Pour wet ingredients into dry ingredients and stir gently until just combined. Do not overmix; batter should remain slightly lumpy.
05 - Lightly grease waffle iron with nonstick spray or melted butter.
06 - Pour approximately 1/2 cup batter per waffle (adjust according to your iron's capacity), close lid, and cook 4-5 minutes until golden brown and crisp.
07 - Remove waffles and keep warm. Repeat with remaining batter. Serve immediately with maple syrup, fresh berries, or powdered sugar.