Ingredients

• 2 tablespoons unsalted butter, softened
• 1/4 cup granulated sugar
• 1 large egg
• 1/2 teaspoon pure vanilla extract
• 1 tablespoon caramel sauce, store-bought or homemade
• 2 tablespoons milk
• 6 tablespoons (1/4 cup plus 2 tablespoons) self-rising flour
• 1/2 teaspoon fleur de sel
• 4 caramel candies, preferably salted

Instructions

1. In a large mug, whisk together the butter and sugar with a fork. Stir in the egg, vanilla, caramel sauce, and milk. Add the flour and 1/4 teaspoon of the fleur de sel. Beat the batter until smooth. Divide the batter between two mugs. Top each mug with a pinch of the remaining fleur de sel. Microwave separately for 30 seconds each. Place two caramel candies on the top of each partially cooked mug cake, then continue cooking 1 to 1 1/2 minutes more until risen and firm.