In a small bowl, add the flour, bicarb soda and salt and mix.
Place the blueberries into the bowl and gently coat with this flour mix. It will hopefully help the blueberries not all sink to the bottom of the muffins.
In a large bowl, add the sourdough starter, sugar, egg, melted butter and vanilla. Mix well, making sure all is combined.
Carefully fold the dry mixture into the wet mixture.
Spoon the mixture into the prepared muffin tin.
Bake for 20 minutes, until a skewer inserted comes out clean.
Nutritional information is an estimate and provided as a courtesy. The values may vary according to the ingredients and tools that are used. Please use your preferred nutritional calculator for more detailed information.