01 - Combine whole milk and heavy cream in a medium saucepan over medium heat. Warm until steaming but not boiling, stirring occasionally to prevent scorching.
02 - Add chocolate chips, caramel sauce, and granulated sugar to the warm milk mixture. Whisk continuously until chocolate and caramel are completely melted and incorporated, creating a smooth, velvety base.
03 - Stir in sea salt and vanilla extract until fully blended. Taste the mixture and adjust sweetness or saltiness to your preference.
04 - Evenly divide the hot chocolate between two pre-warmed mugs, ensuring each serving gets an equal amount of the rich mixture.
05 - Top each mug with a generous dollop of whipped cream. Drizzle with additional caramel sauce and finish with a pinch of flaky sea salt. Serve immediately while hot.