Nutella Cupcakes

Bahan-bahan (20 porsi)

• 1/2 cup (1 stick) butter, softened
• 1 1/2 cups granulated sugar
• 2 eggs
• 2 tsp . vanilla extract, store-bought or homemade
• 1 1/2 cups all-purpose flour
• 1/2 cup dark chocolate cocoa powder (or any unsweetened cocoa powder)
• 1 tsp . baking soda
• 1/4 tsp . salt
• 1/2 cup buttermilk
• 1/2 cup coffee, lukewarm (you can use decaf coffee if desired!)
• 1 (13-ounce) jar Nutella, to fill the cupcakes (you may or may not use the whole jar)
• Nutella frosting
• coarse sea salt, for sprinkling
• 1 cup (2 sticks) unsalted butter, room temperature
• 1 cup Nutella
• 2 tsp . vanilla extract
• 4 cups powdered sugar
• pinch of kosher salt
• 2 -3 Tbsp. milk (or heavy cream)