If you happen to have a golden, mellow, more complex tequila in your drinks cupboard, this is the time to use it.

• 3 tbsp lime juice
• 2 tbsp triple sec
• 6 tbsp tequila
• 250ml (8 1/2 fl oz) cracked ice
• 3 tsp icing sugar, or to taste
• 2 large tbsp crushed ice

Frost the glasses with the lime juice and some salt. Measure all ingredients, except for the 2 large spoons of crushed ice, into the blender jar. Whizz until slushy. Taste for sweetness before serving. Pour into small tumblers or margarita glasses, and serve with a spoonful of ice in each glass.