📖 Instructions

1. **For the Salted Caramel Sauce (make first):** Get a medium-sized, heavy-bottomed saucepan. Pour in your granulated sugar and add the water. Stir gently just enough to moisten all the sugar. Resist the urge to stir it once it starts cooking!
2. Place the saucepan over medium-high heat. Let the sugar syrup come to a boil. Watch it carefully! Don't walk away. It will boil and then start to turn a light amber color around the edges. This is where the magic happens and things move quickly. You want a beautiful, deep amber color, similar to an old penny. If it's too light, it won't have much flavor; if it's too dark, it'll taste burnt.
3. As soon as it reaches that perfect deep amber, immediately take the pan off the heat. Very carefully, slowly pour in the heavy cream. Be warned, it will bubble up vigorously! Stir gently with a heat-proof whisk or wooden spoon until the caramel is smooth and combined. Don't worry if it seizes a bit at first, just keep stirring gently off the heat.
4. Add the butter (if using) and the salt. Stir until the butter has completely melted and everything is smoothly incorporated. Pour the finished caramel into a heatproof jar or bowl and set aside to cool slightly while you make the hot chocolate. It will thicken considerably as it cools. You'll want about 2-3 tablespoons per serving for the swirl, plus extra for drizzling!
5. **For the Hot Chocolate:** In a separate medium saucepan, combine the whole milk, heavy cream, cocoa powder, granulated sugar, and vanilla extract. Whisk these ingredients together really well until the cocoa powder and sugar are dissolved and there are no lumps.
6. Place the saucepan over medium heat. Continue to whisk gently and continuously. You want to heat the mixture until it's very hot and steaming, but do not let it come to a rolling boil. Keep an eye on the bottom of the pan to prevent scorching.
7. Once the milk mixture is hot, remove the saucepan from the heat. Add the chopped dark chocolate or chocolate chips. Let it sit for about 1-2 minutes to allow the chocolate to start melting.
8. After a minute or two, whisk the mixture vigorously until all the chocolate is fully melted and the hot chocolate is smooth, glossy, and beautifully combined. It should be rich and uniform in color.
9. **To Assemble:** Get your serving mugs ready. Pour a tablespoon or two of the slightly cooled salted caramel sauce into the bottom of each mug. This is your base swirl!
10. Carefully pour the hot chocolate over the caramel in each mug. You can use a spoon to gently stir some of the caramel up from the bottom, creating those lovely swirls you see in fancy coffee shops.
11. Optional: Top your hot chocolate with a generous dollop of whipped cream, an extra drizzle of that amazing salted caramel sauce, and maybe a tiny sprinkle of flaky sea salt for a visual and textural flourish. Serve immediately and enjoy every single sip! It’s truly a special treat, perfect for movie nights or just a quiet moment to yourself.
12. If you have any leftover caramel, store it in an airtight container in the fridge for up to 2 weeks. It’s amazing over ice cream too!