Decadent Chocolate Donuts

Ingredients

• 1 cup all-purpose flour
• 1/3 cup cocoa powder
• 1 teaspoon baking powder
• 1/4 teaspoon baking soda
• 1/2 teaspoon salt
• 1/2 cup granulated sugar
• 1/4 cup unsalted butter, melted
• 1/2 cup buttermilk
• 1 large egg
• 1 teaspoon vanilla extract
• 1 cup powdered sugar
• 2 tablespoons cocoa powder
• 3-4 tablespoons milk
• 1/2 teaspoon vanilla extract
• Sprinkles or toppings of your choice (optional)