Vietnamese flan is a smooth, creamy caramel custard made with milk, eggs, sugar, and vanilla. Bake it in a water bath or use the Instant Pot, then chill until set for an easy make-ahead dessert.
Preheat & Prep: Preheat oven to 300°F and bring a kettle of water to a boil. Mix instant espresso and water (if using).
Make Caramel: In a small pan, melt ½ cup sugar over medium-low heat until golden amber. Stir in coffee mixture if using. Quickly pour into ramekins or baking dish and swirl to coat bottoms.
Make Custard: Warm the milk and sugar in a saucepan until sugar dissolves. Let cool slightly.
Temper Eggs: Whisk eggs, yolks, and vanilla. Slowly add the warm milk a little at a time to prevent scrambling.
Strain & Pour: Pour custard through a fine mesh sieve into the caramel-coated ramekins or baking dish.
Bake or Pressure Cook:Oven: Cover with foil. Place in a baking tray and fill with boiling water halfway up the sides. Bake 50–70 minutes, or until just set with a slight jiggle.Instant Pot: Add 1 cup water to pot. Place ramekins on trivet. Pressure cook on high for 12 minutes. Natural release.
Chill: Cool to room temp, cover with plastic wrap, and chill 4–6 hours or overnight.
Unmold: Run a knife around the edge, flip onto a serving plate, and let the caramel flow. Serve chilled and enjoy!
Notes
Work quickly with the caramel; it hardens fast.
Temper the eggs slowly to avoid curdling.
Strain the custard for the smoothest texture.
For easier unmolding, place ramekins in warm water for a minute before flipping.