Simmmer.

Step 1 of 5

Vietnamese Caramel Trout

Step 1 of 5

Scatter the sugar into a wide, shallow pan with a splash of water. Melt it over gentle heat, swirling the pan rather than stirring, then raise the heat and let it bubble to a deep amber.

Caramel goes from amber to bitter in about ten seconds, so stay with the pan.