Pre heat waffle iron according to manufacturer instructions.
Mix flour, sugar, baking powder and baking soda in a medium bowl and set aside.
Add eggs, buttermilk and melted butter into a large bowl and whisk until thoroughly combined. Add the combined dry ingredients and blueberries. Stir to combine.
Grease your hot waffle iron with cooking spray and pour about ½ cup of batter for each waffle. Cook until they are a deep golden brown, which usually takes around 6 minutes in my waffle iron.Serve hot maple syrup and fresh blueberries.
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Notes
Cook until they get a deep golden brown for a crispy exterior.Grease your waffle maker before each batch, to make sure that they don't stick.To make your own buttermilk, mix 2 cups milk and 6 tablespoons of white vinegar or lemon juice. Let it stand for about 10 minutes. Stir and measure 2 ¼ cups for the recipe.