In a large saucepan, heat milk, cream, cinnamon sticks, cardamom pods and seeds, cloves, vanilla bean, and vanilla bean seeds over medium heat just until bubbles form around edges of pan (do not boil). Remove from heat, and let steep for 20 minutes.
Strain mixture through a fine-mesh sieve, discarding solids.
Return milk mixture to pan, and stir in chopped white chocolate. Reduce heat to medium-low and cook, stirring occasionally, until white chocolate is melted and mixture is heated through. Garnish servings with whipped cream, ground cinnamon, and cinnamon sticks, if desired.
Recipe by Victoria at https://victoriamag.com/spiced-white-hot-chocolate-recipe/