Ingredients
Method
- Syrup: put the sugar in a dry, heavy saucepan over medium heat. Let it melt undisturbed, swirling the pan occasionally, until deep amber like maple syrup, 6–8 minutes.
- Remove from the heat. Very carefully pour in the hot water a little at a time — it will bubble vigorously. Whisk until smooth.
- Whisk in the butter, vanilla and salt. Cool 20 minutes and bottle. It thickens as it cools.
- Topping: spread the 1/4 cup sugar in a thin layer on a parchment-lined tray. Broil on high (or torch) until amber and melted, 1–2 minutes, watching constantly.
- Cool completely, then crack into small shards. Store airtight.
- To serve: add 2 tablespoons syrup to a latte, cap with foam, and scatter shards on top. Serve immediately — the crackle lasts about 5 minutes.
Notes
Molten sugar is extremely hot — keep water and kids away from the pan. Syrup keeps 1 month refrigerated; topping 2 weeks airtight.