Whoopie Pies With Salted Caramel Buttercream

Name: Whoopie Pies With Salted Caramel Buttercream
Prep time: 24 min
Cook time: 24 min
Total time: 24 min
Yield: 5
Cuisine: Global
Ingredients: 2 teaspoons baking soda; 118 milliliters packed brown sugar; 118 milliliters butter, softened; 177 milliliters cocoa powder; 40 mLs tbsp + 2 tsp cream; 1 egg; 2 egg whites; 414 milliliters all-purpose flour; 237 milliliters milk; 1 teaspoons salt; 1 pinch pinch of salt; 118 milliliters sugar, divided; 1 teaspoon vanilla extract; 2 Tbsps water; 118 milliliters white sugar