01 - Whisk together sourdough discard, milk, eggs, melted butter, and vanilla in a large mixing bowl until smooth.
02 - Combine flour, sugar, baking powder, baking soda, and salt in a separate bowl.
03 - Add dry ingredients to wet mixture and gently fold until just combined. Do not overmix; small lumps are acceptable.
04 - Heat nonstick skillet or griddle over medium heat and lightly grease with butter or oil.
05 - Pour ¼ cup batter per pancake onto skillet. Cook until bubbles form on surface and edges appear set, approximately 2–3 minutes.
06 - Flip pancakes and cook 1–2 minutes longer until golden brown and cooked through.
07 - Repeat with remaining batter, greasing pan as needed between batches.
08 - Serve warm with maple syrup, fresh fruit, or desired toppings.