Bubby's Sour Cream Pancakes

coconut sugar2 cups all purpose flour2 1/2 teaspoons baking soda1 1/4 teaspoon kosher salt2 eggs3/4 cup sour cream2 1/2 tablespoons unsalted butter, melted and cooledadditional butter for the griddle1 1/2 cup milkoptional: chocolate chips or blueberries