Salted Dark Chocolate Cupcakes

Ingredients

• 1/2 cup (1 stick) butter, softened
• 1 1/2 cups granulated sugar
• 2 eggs
• 2 tsp. vanilla extract
• 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!)
• chocolate ganache frosting
• coarse sea salt, for sprinkling
• 18 ounces dark chocolate, chopped
• 1 1/2 cups heavy cream