Popcorn Chocolate Cupcakes

Ingredients

• 1 cup all purpose flour
• 1/2 cup cocoa powder
• 3/4 teaspoon baking soda
• 3/4 teaspoon baking powder
• 1/2 teaspoon salt
• 1/2 cup sugar
• 1 egg
• 2 teaspoons vanilla extract
• 1/2 cup milk
• 1/4 cup canola oil
• 1/2 cup strong brewed coffee, hot
• 1/2 cup (stick) butter, softened
• 1/3 cup heavy cream
• 1/2 cup packed brown sugar
• 1 1/2 cups powdered sugar
• 1/2 of a vanilla bean, beans scraped out
• 2 teaspoons vanilla
• 3 cups air popped popcorn
• 4 tablespoons butter
• 2 teaspoons kosher salt
• 1/3 cup brown sugar
• 1 teaspoon vanilla
• 1/2 cup chocolate chips, melted