Old Fashioned Pancakes

• 1 ½ cups all-purpose flour
• 3 ½ teaspoons baking powder
• ¼ teaspoon salt
• 1 ½ tablespoons sugar
• 1 teaspoon vanilla extract
• 3 tablespoons butter, melted
• 1 egg
• 1 ¼ cups milk
• 1 cup sourdough starter/discard (optional)