Mix sourdough starter, buttermilk, flour, and sugar together in a large bowl. Cover loosely with plastic wrap and let sit on the countertop overnight.
1. Preheat your skillet. 2. Stir in the melted butter, eggs, salt, baking soda, and baking powder into the batter. Mix well to combine. 3. Pour 1/4 to 1/2 cup of batter onto the preheated skillet and cook for 1 to 2 minutes until it starts to bubble then flip the pancake and cook for 1 to 2 more minutes until it is golden brown.
Adopted from : https://savorthebest.com/overnight-sourdough-pancakes/