From: https://www.davidlebovitz.com/creme-caramel-flan-recipe/


Ingredients

    Caramel:
  • 200g sugar
  • a few drops of corn syrup
  • 60ml water
  • a few drops lemon juice

    • For the custard:

  • 8 large eggs room temperature (20 to 25 °C)
  • 130g sugar
  • 800ml whole milk
  • Seeds from 1 vanilla bean or 1 1/2 tsp vanilla extract

Directions

  1. Preheat the oven to 300ºF (150ºC).
  2. Lightly butter a 9-inch loaf pan. Have a baking dish with high sides to make a water bath to bake the custard in.
  3. To make the caramel, spread the 200g of sugar in an even layer in a skillet. Pour the water over it and add a few drops of lemon juice. Cook the sugar over medium-high heat until it reaches 245°F to 250°F.
  4. When sugar is a deep amber color, remove from heat; pour the caramel into the buttered mold. Coat evenly. Set aside to cool. It will need to be under 120°F before the custard is added.
  5. Whisk the eggs and sugar. Add vanilla. Gradually add the milk, whisking constantly.
  6. Pour custard into the pan over the cooled caramel. Place flan in baking dish. Pour warm water into the outer dish, until it reaches over halfway up the outside flan.
  7. Bake the uncovered flan in the oven 1 hour, 20 minutes, or until barely set.
  8. Remove from the oven. Rest in the water bath for 30 more minutes.
  9. Transfer the flan to a cooling rack. Let cool to room temperature, then refrigerate until completely chilled, preferably overnight.