Blueberry-Buttermilk Pancakes

INGREDIENTS

• 2 eggs
• 2 cups all-purpose flour, sifted
• 3 Tbs. sugar
• 2 tsp. baking powder
• 1 tsp. baking soda
• 1 tsp. salt
• 2 1/4 cups buttermilk
• 4 Tbs. (1/2 stick) unsalted butter, melted
• 1/2 tsp. vanilla extract
• 1 to 2 Tbs. vegetable oil or nonstick
• cooking spray
• 1 cup fresh blueberries
• Confectioners' sugar for dusting
• Softened butter for serving
• Warm maple syrup for serving