Preheat oven to 350 degrees. Line cupcake pan with cupcake liners. Set aside.
In a large bowl, whisk together flour, baking soda, baking powder, and salt. Set aside.
In a medium saucepan, combine white chocolate baking bars and milk over low heat, stirring continuously until chocolate is melted and mixture is smooth. Set aside.
In a large bowl using an electric mixer, beat butter and sugar until light and fluffy. Blend in melted chocolate and vanilla extract until smooth. Add eggs one at a time, beating well after each addition.
Split vanilla bean down the middle lengthwise; scrape seeds from half of vanilla bean into batter. Reserve other half for buttercream.
Slowly add flour mixture to wet ingredients, alternating between flour and Chobani Greek yogurt; beat at low speed until blended.
Scoop batter into cupcake liners – no more than ⅔ full, or use a #24 disher to scoop batter. Bake for 12-14 minutes. Insert a toothpick into the center of the cupcake, if it comes out clean it is done. Remove cupcakes from oven and allow cupcakes to cool in cupcake pan for 3 minutes; transfer to wire rack and cool completely. Cupcakes should be cooled completely before frosting.
For Vanilla Bean Buttercream
In a large bowl using an electric mixer, beat butter until creamy and smooth.
Turn mixer on lowest speed and add powdered sugar, salt, vanilla extract, vanilla bean seeds, and a tablespoon of milk; mix on low speed until combined.
Turn mixer on high speed and mix for 3 minutes, adding more milk if needed; mix until creamy and smooth.
Pipe or frost cooled cupcakes. Eat & Enjoy!
Notes
Store Vanilla Bean White Velvet Cupcakes in an airtight container; will keep for 3+ days.Store Vanilla Bean Buttercream in an airtight container in the refrigerator for 1 week. When you are ready to use, bring to room temperature and re-whip.