BlueBerryMuffins

Great Blueberry muffins you have to try.
Ingredients:
2 large eggs plus 2 yolks
1 cup sugar
1 cup sour cream
1/2 cup buttermilk
1 tsp vanilla extract
1/4 cup neutral oil (I used grape seed oil)
3 1/2 tbsp butter, melted and cooled
3 cups all purpose flour
1 tsp salt
1 tbsp baking powder
1/2 tsp baking soda
1 1/2 cups blueberries, fresh or frozen
Lemon sugar:
whisk 2 tbsp brown sugar with zest of a lemon

I lost the footage of the muffins coming out of the oven, so the pics will have to do...