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Preheat your oven to the temperature recommended on your puff pastry packaging, typically around 400°F (200°C). Line a baking sheet with parchment paper.

Roll out 1 block of puff pastry to a thin, even thickness. Cut the rolled-out puff pastry into 4 rectangular shapes. Repeat with the second block of puff pastry to yield a total of 8 rectangles.

Place the pastry rectangles on the prepared baking sheet. Bake for 15-20 minutes, or until golden brown, puffed, and flaky. Keep an eye on them to prevent burning. Let the baked puff pastry cool completely on a wire rack.

Once cooled, generously sprinkle the puff pastry rectangles with powdered sugar. Using a kitchen torch, caramelize the powdered sugar on each pastry piece until it forms a crisp, glossy layer. Set aside.

In a medium bowl, whisk together the 2 egg yolks and 50 grams of granulated sugar until the mixture is light in color and creamy.

Add 15 grams of cornstarch to the egg mixture and whisk until it is well combined and smooth, with no lumps.

In a saucepan, heat 250 grams of milk over medium heat until it is simmering gently, but not boiling.

Carefully temper the egg yolk mixture: slowly pour a small amount (about 1/4 cup) of the hot milk into the egg yolk mixture while whisking constantly. This prevents the eggs from scrambling.

Pour the tempered egg yolk mixture back into the saucepan with the remaining hot milk. Continue to whisk constantly over medium heat. The mixture will thicken significantly to a pastry cream consistency, usually within 3-5 minutes.

Remove the saucepan from the heat. Add 1/2 teaspoon of vanilla extract (or vanilla paste/bean) and 15 grams of butter to the hot pastry cream.

Whisk until the vanilla and butter are fully incorporated and the cream is smooth and glossy.

Transfer the crème pâtissière to a clean bowl. Cover the surface of the cream directly with plastic wrap to prevent a skin from forming. Chill the crème pâtissière in the refrigerator until completely cool and set, at least 2 hours.

To assemble, take one piece of caramelized puff pastry. Pipe or spread a generous layer of the chilled crème pâtissière onto the puff pastry.

Place a scoop of your desired ice cream (e.g., Black Sesam-isu Ice Cream) on top of the pastry cream.

Gently place another piece of caramelized puff pastry on top to form a sandwich. Repeat for the remaining sandos.

Optionally, dust the finished sando with a little more powdered sugar before serving immediately.


Preheat your oven to the temperature recommended on your puff pastry packaging, typically around 400°F (200°C). Line a baking sheet with parchment paper.

Roll out 1 block of puff pastry to a thin, even thickness. Cut the rolled-out puff pastry into 4 rectangular shapes. Repeat with the second block of puff pastry to yield a total of 8 rectangles.

Place the pastry rectangles on the prepared baking sheet. Bake for 15-20 minutes, or until golden brown, puffed, and flaky. Keep an eye on them to prevent burning. Let the baked puff pastry cool completely on a wire rack.

Once cooled, generously sprinkle the puff pastry rectangles with powdered sugar. Using a kitchen torch, caramelize the powdered sugar on each pastry piece until it forms a crisp, glossy layer. Set aside.

In a medium bowl, whisk together the 2 egg yolks and 50 grams of granulated sugar until the mixture is light in color and creamy.

Add 15 grams of cornstarch to the egg mixture and whisk until it is well combined and smooth, with no lumps.

In a saucepan, heat 250 grams of milk over medium heat until it is simmering gently, but not boiling.

Carefully temper the egg yolk mixture: slowly pour a small amount (about 1/4 cup) of the hot milk into the egg yolk mixture while whisking constantly. This prevents the eggs from scrambling.

Pour the tempered egg yolk mixture back into the saucepan with the remaining hot milk. Continue to whisk constantly over medium heat. The mixture will thicken significantly to a pastry cream consistency, usually within 3-5 minutes.

Remove the saucepan from the heat. Add 1/2 teaspoon of vanilla extract (or vanilla paste/bean) and 15 grams of butter to the hot pastry cream.

Whisk until the vanilla and butter are fully incorporated and the cream is smooth and glossy.

Transfer the crème pâtissière to a clean bowl. Cover the surface of the cream directly with plastic wrap to prevent a skin from forming. Chill the crème pâtissière in the refrigerator until completely cool and set, at least 2 hours.

To assemble, take one piece of caramelized puff pastry. Pipe or spread a generous layer of the chilled crème pâtissière onto the puff pastry.

Place a scoop of your desired ice cream (e.g., Black Sesam-isu Ice Cream) on top of the pastry cream.

Gently place another piece of caramelized puff pastry on top to form a sandwich. Repeat for the remaining sandos.

Optionally, dust the finished sando with a little more powdered sugar before serving immediately.
