Triple Berry Scones

Name: Triple Berry Scones
Prep time: 30 min
Cook time: 25 min
Total time: 55 min
Cuisine: American
Ingredients: 2 medium eggs; 1/2 cup sour cream ( or crème fraîche); 1/2 teaspoon pure vanilla; 2 cups organic all-purpose flour (plus more for rolling); 2 1/2 teaspoons baking powder; 1/4 cup raw cane sugar; 1/2 teaspoon sea salt; 3/4 cup unsalted butter (chilled (1 1/2 sticks)); 1/2 cup fresh blueberries; 1/2 cup fresh raspberries; 1/2 cup sliced strawberries; 1 egg; 1 Tablespoon milk; sugar (for sprinkling (I used demerara))