Chocolate whoopie pies with salted Swiss buttercream | Recipe | Kitchen Stories

Ingredients

• 1.75 cups sugar (divided)
• 1 tbsp molasses
• 3 sticks butter (softened, divided)
• 1 egg
• 2 tsp vanilla extract (divided)
• 2 cups flour
• 0.5 cup cocoa
• 1.25 tsp baking soda
• 1 tsp salt
• 1 cup buttermilk
• 3 egg whites
• 1 vanilla bean
• 0.5 tsp fleur de sel
• fleur de sel for serving
• butter for greasing