Kue Batangan Gula Mentega Coklat dengan Frosting Cokelat Putih

Bahan-bahan (14 porsi)

• 2 sticks salted butter, cubed
• 1 cup granulated sugar
• 2 teaspoons pure vanilla extract
• 2 eggs, at room temperature
• 2 1/2 cups all-purpose flour
• 1 teaspoon baking soda
• 1 stick salted butter
• 1/2 cup confectioners sugar
• 1 cup high quality white chocolate chips, melted and cooled to touch
• 1 teaspoon pure vanilla extract
• melted chocolate and white chocolate, for decorating