King Charles III and Queen Camilla showcased their taste for Girl Scouts cookies by purchasing a box of Thin Mints during a stop in Front Royal, Virginia. This minty, chocolate-coated cookie remains the best-selling option among Girl Scouts cookies, consistently surpassing other favorites like Tagalongs, which feature rich peanut butter, and Samoas, known for their coconut flavor. The royal couple's choice reflects a common preference among Americans, as Thin Mints are widely regarded as the top pick. Their purchase took place during the final leg of their four-day visit to the United States, highlighting the charm of Front Royal, a historic town that serves as the northern gateway to the Shenandoah Valley.