Add your milk and vinegar to a cup and let sit for 15 minutes. You can skip this if you are using buttermilk.
Add in your dry ingredients and whisk to combine.
Add in your melted butter, egg, vanilla, homemade buttermilk and mix until well combined.
Mix in your blueberries until full incorporated.
Add a tbsp oil to your pan and heat it on medium low heat. Add oil as needed.
Once hot, pour in 1/4 cupful of batter and fry until bubbles form on the top and the bottom browns, about 2-3 minutes.
Flip and cook for another 2 minutes.
Serve hot with additional blueberries, butter, and maple syrup.