01 - Whisk together flour, sugar, baking powder, baking soda, and salt in a large bowl.
02 - Beat buttermilk, eggs, melted butter, and vanilla extract in a separate bowl until evenly blended.
03 - Gently pour the wet ingredients into the dry and stir just until combined; batter should remain slightly lumpy.
04 - Carefully fold in the blueberries without thawing if frozen to prevent color bleeding.
05 - Heat a non-stick skillet or griddle over medium heat and lightly grease with butter or oil.
06 - Pour approximately 1/4 cup batter per pancake onto the skillet; cook 2 to 3 minutes until bubbles form and edges are set.
07 - Turn pancakes and cook an additional 1 to 2 minutes until golden and cooked through.
08 - Transfer pancakes to a warm plate; repeat with remaining batter and serve with optional maple syrup.