Vanilla Bean Buttermilk Cupcakes
4 Eggs
1 teaspoon Pure Vanilla Bean Paste (or the seeds of 1 Vanilla Bean Pod, or 2 teaspoons of Pure Vanilla Extract)
1 ¼ cups Buttermilk
3 cups Cake Flour
2 cups Sugar
3 ½ teaspoons Baking Powder
½ teaspoon Salt
1 cup (2 sticks) Unsalted Butter, at Room Temperature

Nutella Buttercream
1 ½ cups (3 Sticks) Unsalted Butter (Softened)
3 cups Confectioners Sugar
1/8 tsp. Salt
2 tsp. Pure Vanilla Extract
1 cup Nutella