Blueberry pancakes recipe

INGREDIENTS

• 3/4 cup milk
• 2 tablespoons white vinegar
• 1 cup flour
• 2 tablespoons sugar
• 1 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 1 egg
• 2 tablespoons melted butter
• 1+ cup fresh blueberries
• more butter for the pan