Tall Parisian Vanilla Bean Flan with Caramelized Top

This tall Parisian Vanilla Bean Flan is the kind of dessert you'd find in a sunlit boulangerie, with a blistered mahogany top and a trembling, creamy custard that's speckled with thousands of vanilla seeds.

The contrast between the caramelized surface and the silky interior is pure magic. It's surprisingly simple to make at home, requiring just a handful of ingredients and a little patience for chilling. The result is a showstopping dessert that looks and tastes professionally made.

Parisian flan, or Flan Pâtissier, is a beloved French bakery classic: a rich vanilla custard baked in a buttery pastry shell until the top is deeply caramelized and blistered. This version uses a high-sided puff pastry ring, giving you an impressive tall slice with a crisp, flaky crust and a creamy, vanilla-scented center.

The custard is thickened with cornstarch and egg yolks, creating a stable yet silky texture that slices beautifully. Whether served for a special occasion or simply to satisfy a sweet craving, this flan delivers bakery-level perfection right from your own oven.

Ingredients

Why this recipe works

The method here is all about achieving the perfect custard texture. By cooking the milk and cream with vanilla beans before mixing with the egg yolks, you infuse the dairy with maximum vanilla flavor.

Then, whisking the yolks with sugar and cornstarch creates a stable base that will thicken into a glossy, sliceable custard without becoming rubbery or curdling.

The high oven temperature is key to that signature blistered top. Baking at 390°F allows the surface to caramelize quickly while the inside remains moist and creamy.

The puff pastry ring provides structure and a buttery, flaky contrast to the smooth custard. Chilling the flan fully set before slicing ensures clean, tall wedges that hold their shape beautifully.

Notes and substitutions

Use whole milk and heavy cream for the richest, creamiest custard. Lower-fat milks will result in a thinner, less luxurious texture. Real vanilla beans are essential for the classic speckled look and deep flavor; vanilla extract can be substituted in a pinch, but the visual appeal will be different.

The puff pastry ring can be store-bought or made ahead. If using a springform pan, line the bottom with parchment and butter the sides well. A high-sided ring gives the flan its characteristic tall appearance. Ensure the pastry ring is sturdy enough to hold the custard without leaking.

• vanilla beans: 2 teaspoons vanilla bean paste or 1 tablespoon vanilla extract
• whole milk: 2% milk (the flan will be slightly less rich)
• heavy cream: half-and-half (the custard will be a bit lighter)
• cornstarch: an equal amount of all-purpose flour (the texture will be less glossy)

Equipment

• Heavy-bottomed saucepan
• Whisk
• Fine-mesh strainer
• 9-inch high-sided tart ring or springform pan
• Baking sheet
• Instant-read thermometer