1/2 cup unsalted butter softened
3/4 cup white sugar
2 large eggs
1/2 cup buttermilk
2 teaspoons vanilla extract
1 cup all purpose flour
1 cup whole wheat flour
2 teaspoons of baking powder
1/4 teaspoon of salt. I use French sea salt.
2 cups frozen berries. I use frozen mixed berries, straight from the freezer.
Topping For Each Muffin: Sprinkling of coarse Turbinado sugar like Sugar In The Raw or regular white sugar