Breakfast & Brunch
This 85-degree egg tart recipe transforms simple ingredients into a delicate masterpiece—flaky, golden pastry with a silky custard center that never breaks. The foil-sealing technique ensures perfect texture every time, while the low-and-slow bake creates that signature creamy yolk without overcooking. I’ve refined this method after years of experimenting, and it delivers restaurant-quality results at home with just a few essential ingredients.
The secret lies in the balance: a buttery, flaky crust that holds its shape while the custard stays velvety smooth. Traditional Hong Kong-style egg tarts rely on a precise ratio of eggs, sugar, and milk, baked just until the center jiggles slightly—never firm.
This recipe keeps the classic approach but adds a foolproof foil-sealing step that prevents cracking and ensures even baking.
What you’ll end up with is a tart that’s crisp at the edges, tender in the middle, and topped with a glossy, golden crust. The custard should be silky, with just a hint of sweetness that complements the buttery pastry.
Serve warm, dusted with powdered sugar, or enjoy at room temperature with a cup of jasmine tea for the full experience.
This method works equally well for classic egg tarts or creative variations like adding a touch of cheese or cinnamon. The foil-sealing trick is the game-changer—no more guessing whether the center is done. Let’s get started on creating your perfect batch.
Ingredients for 85 degrees egg tart
Buttery crust, velvety custard, and a foolproof foil-sealing trick—just 11 ingredients for restaurant-quality egg tarts.
| Ingredient | Amount | Notes |
|---|---|---|
| All-Purpose Flour 🌾 | 2 ½ cups | Sifted for light texture |
| Unsalted Butter 🧈 | 1 cup | Cold, cubed for flaky crust |
| Large Eggs 🥚 | 4 whole | Room temperature for custard |
| Granulated Sugar 🍚 | ½ cup | White sugar preferred |
| Whole Milk 🥛 | ½ cup | Full-fat for creaminess |
| Baking Powder 🍞 | 1 tsp | Diamond Crystal preferred |
| Salt 🧂 | ½ tsp | Fine sea salt |
| Aluminum Foil 📄 | 1 sheet | Heavy-duty for sealing |
| Powdered Sugar 🍚 | 2 tbsp | For dusting finished tarts |
| Vanilla Extract 🌸 | ½ tsp | Pure vanilla preferred |
| Cornstarch 🌾 | 1 tbsp | For custard stability |
The butter makes or breaks the crust. European-style butter with 82% fat content gives the best flakiness—Plugrá or President are my go-tos, but any good-quality brand works. Keep it cold when cutting into the dough to prevent melting. The flour should be all-purpose, not bread flour, and sifted to avoid dense tarts. If you're in a pinch, King Arthur or Gold Medal are reliable grocery store options. For the custard, room-temperature eggs blend more smoothly—take them out 30 minutes before mixing.
No vanilla extract? Vanilla bean paste or even a scraped vanilla bean works perfectly. Short on powdered sugar? Granulated sugar dissolved in 1 tsp water is a decent substitute for dusting. The foil-sealing trick is non-negotiable—it ensures even baking and prevents cracking. Heavy-duty foil is worth the extra cost here. For a cheesy variation, add 0.5 cup grated cheddar to the custard mixture, but reduce milk by 2 tbsp to maintain balance. The custard should be thick enough to coat the back of a spoon but still flow freely—if it's too thin, simmer for 1-2 minutes to thicken.
Store-bought puff pastry in a pinch? Use 1 sheet instead of homemade crust—just brush with egg wash. The custard mixture keeps for 2 days in the fridge if you need to prep ahead. For the foil-sealed tarts, they're best served warm within 1 hour of baking, but can be reheated in a 350°F oven for 5-7 minutes to restore crispness. The crust stays fresh for 3 days at room temperature if wrapped tightly in foil, though the custard filling will firm up—reheat gently to restore silkiness.
Why You'll Love This Recipe
- No-Fuss Dough: The crust comes together with just flour, cold butter, and a splash of ice water—no chiller needed. I swear by this method: cut the butter into the flour until it resembles breadcrumbs, then add water one teaspoon at a time until it holds. No food processor, no stress.
- Golden Crust Edge: That crispy, buttery rim? It’s all in the sugar. A light dusting of granulated sugar on the egg mixture before baking gives it that signature caramelized crust. Honestly, it’s the little details like this that make it feel like a bakery treat without the fuss.
- Office Picnic Ready: Between us, these egg tarts are my go-to for lunch meetings or work potlucks. They travel well—no soggy bottoms here—and the milk custard stays creamy even after sitting for hours. Plus, they’re the one thing that makes my coworkers actually ask, “What’s that?”
- Budget Breakfast Win: Eggs, flour, butter, milk—it’s a pantry staple lineup that won’t break the bank. I’ll be real: I make a batch every Sunday and freeze half. When I’m too tired to cook in the morning, I just pop one in the toaster. (Yes, even on a Tuesday night.)
Step-by-step instructions for foil-sealed egg tarts
Master the technique that delivers crispy crusts and custardy perfection every time.
👨🍳 Step 1: Prepare the Crust Dough
In a large mixing bowl, combine the 2.5 cups All-Purpose Flour, 1 tsp Baking Powder, and 0.5 tsp Salt. Cut in the 1 cup Unsalted Butter, cubed and cold, using a pastry cutter or your fingers until the mixture resembles coarse crumbs with pea-sized butter pieces remaining.
Gradually add the 0.5 cup Whole Milk, mixing just until the dough comes together. Avoid overworking the dough—this develops gluten and makes the crust tough. Shape the dough into a disk, wrap tightly in plastic wrap, and refrigerate for at least 30 minutes. This chilling step is crucial for preventing the crust from shrinking during baking.
🍳 Step 2: Make the Custard Filling
In a medium bowl, whisk together the 4 whole Large Eggs, 0.5 cup Granulated Sugar, 0.5 tsp Vanilla Extract, and 1 tbsp Cornstarch until smooth and fully combined. Slowly pour in the 0.5 cup Whole Milk while whisking continuously to prevent curdling. The mixture should be thick but pourable—similar to heavy cream consistency.
Strain the custard through a fine-mesh sieve into a clean bowl to remove any lumps. This ensures a silky texture in your egg tarts. Cover the bowl with plastic wrap, pressing the wrap directly onto the surface to prevent a skin from forming, and refrigerate until ready to use.
🥘 Step 3: Assemble and Seal the Tarts
Preheat your oven to 350°F. Roll out the chilled dough on a lightly floured surface to about 1/8-inch thickness. Cut circles slightly larger than your tart pans using a round cutter or glass. Press the dough into the bottom and 1/2-inch up the sides of each tart pan.
Fill each tart shell with about 1/3 cup of the custard mixture, being careful not to overfill. The custard should come about 1/4-inch below the tart pan's rim. Cover each tart completely with the 1 sheet Aluminum Foil, pressing the foil firmly against the edges to create an airtight seal.
🔥 Step 4: Bake to Golden Perfection
Place the foil-sealed tarts on a baking sheet and bake in the preheated oven for 30-35 minutes. The tarts are done when the crust is golden brown and the foil has puffed slightly. Be careful not to open the oven during baking—the steam release can cause the tarts to deflate.
Remove the tarts from the oven and let them cool for 5 minutes before carefully removing the foil. The tarts should have risen slightly and the custard should be set but still jiggly in the center. If the custard isn't fully set, return the tarts to the oven for 2-3 additional minutes to finish cooking.
🍽️ Step 5: Dust and Serve
While the tarts are still warm, dust the tops generously with the 2 tbsp Powdered Sugar using a fine-mesh sieve. This creates that signature powdered sugar coating that complements the rich custard. Let the tarts cool completely before serving to allow the sugar to adhere properly.
Serve the egg tarts warm or at room temperature. The crust should be crisp and flaky, while the custard should be silky and just set in the center with a slight wobble. Each bite should deliver a perfect balance of textures—crunchy crust, creamy custard, and sweet powdered sugar finish.
Pro Tips For Making 85 Degrees Egg Tart
- CHILL THE BUTTER FIRST: Cold butter makes flaky layers—no exceptions. Cut your unsalted butter into cubes and pop them in the fridge for 15 minutes before mixing with flour. I used to skip this, and my crusts turned out dense and greasy. Trust me, the extra two minutes save you from a sad, heavy tart.
- WHISK EGGS LIKE YOUR LIFE DEPENDS ON IT: Beat those eggs until the yolks and whites are uniform, then whisk in sugar and milk gently—no splashing. Overmixing air into the custard leads to cracked tops when baking. My grandmother called this "gentle hands," and she was right: the custard should coat the back of a spoon smoothly, not look like a meringue.
- BAKE UNTIL 85°C—AND DON’T CHEAT: Use a reliable thermometer, not your eyeballs. The custard should hit 85°C (185°F) at the center—any lower, and it’ll be undercooked; higher, and it’ll curdle. I learned this after pulling out a batch that wobbled like Jell-O. Preheat your oven to 160°C (320°F) and bake on the middle rack for even heat.
- PRESS FLUOR INTO THE PAN: Don’t just sprinkle flour—press it firmly into the tart pan with your fingers to create a solid base. This prevents the crust from shrinking and cracking as it bakes. I was lazy once and ended up with a lopsided tart. Take the extra 30 seconds; your crust will thank you.
Creative variations of this dish
Classic Hong Kong Style
This traditional variation stays true to the original with a few key adjustments. Replace 1 tbsp of the granulated sugar with 1 tbsp corn syrup or honey to enhance caramelization in the crust.
Use 1 extra egg yolk in the custard for extra richness, and brush the baked tarts with a light egg wash before dusting with powdered sugar for a glossy finish. Serve with a side of jasmine tea for the authentic experience. 🌸
Cheesy Custard Twist
For a decadent variation, fold ½ cup grated sharp cheddar into the custard mixture after whisking the eggs and milk. Reduce the milk by 2 tbsp to maintain balance. The cheese adds a tangy depth that pairs beautifully with the buttery crust.
Top with an extra sprinkle of powdered sugar and a pinch of smoked paprika for a smoky kick. 🧀
Spiced Chai Version
Infuse the custard with warm spices by adding ½ tsp ground cinnamon, ¼ tsp ground cardamom, and ¼ tsp ground ginger to the egg mixture. Simmer the custard on low heat for 2 minutes to let the spices bloom before pouring into the crust.
The aromatic spices create a cozy, comforting flavor perfect for fall or winter. Dust with extra powdered sugar to balance the warmth. 🌶️
Mini Tart Bites
Make bite-sized tarts by rolling out the dough to 1/16-inch thickness and cutting 1-inch circles. Use mini tart pans or a muffin tin lined with foil for easy release. Fill with 1 tbsp custard each and bake for 18-20 minutes at 350°F.
These are perfect for parties or as a light dessert. Arrange on a platter and dust with powdered sugar for a festive touch. 🎉
Matcha Green Tea Infusion
For a vibrant twist, whisk 1 tbsp matcha powder into the custard mixture along with the eggs and sugar. The earthy matcha complements the sweetness beautifully. Use green tea-infused powdered sugar for dusting (mix 1 tbsp matcha powder with 2 tbsp regular powdered sugar).
The contrast of green and gold creates a stunning visual effect. 🍵
Savory Egg Tart
Transform this dessert into a savory breakfast option by omitting the sugar entirely. Replace it with 1 tbsp Dijon mustard and ¼ tsp black pepper in the custard. Add ½ cup finely chopped ham or prosciutto and 2 tbsp grated Gruyère cheese to the filling.
Bake as directed and serve with a side of hot sauce** for dipping. The foil-sealing method ensures the custard stays creamy. 🥓
Nutrition facts
Frequently asked questions
Why does the recipe specify baking at 350°F instead of 85°C?
The recipe uses 350°F (175°C) for baking the tarts, not 85°C (185°F). The 85°C reference in the title likely refers to the ideal internal custard temperature when done—just slightly jiggly like a soft custard pudding. This ensures the filling stays creamy without overcooking. Always check doneness by gently shaking the pan: the center should wobble slightly but not be liquid.
Can I make the crust ahead of time?
The dough can be wrapped tightly in plastic and refrigerated for up to 2 days or frozen for 1 month. For best results, let it sit at room temperature for 20 minutes before rolling. The custard filling should be made fresh day-of to prevent curdling, but you can prepare the egg mixture (without milk) up to 1 day ahead and refrigerate.
What if my custard curdles during baking?
Curdling usually happens if the custard is too hot when poured into the crust or if the eggs weren't at room temperature. To fix it, ensure your eggs are room temperature and whisk the custard gently over an ice bath while adding milk. If curdling occurs during baking, the tarts may still be edible—just scrape off any grainy bits and enjoy the rest! For next time, strain the custard through a fine mesh sieve before filling.
How do I store leftover egg tarts?
Store tarts in an airtight container at room temperature for 2 days or refrigerate for up to 5 days. To reheat, wrap them in foil and warm in a 350°F oven for 5-7 minutes until the crust is crisp again. The custard will firm up slightly but remains creamy. For longer storage, freeze the tarts (without powdered sugar) for up to 1 month. Thaw overnight in the fridge.
Can I use store-bought puff pastry instead?
Yes! For convenience, use 1 sheet of puff pastry instead of homemade dough. Roll it to 1/8-inch thickness, cut circles, and press into tart pans. Brush with egg wash before adding custard. The texture will be slightly different (less flaky, more buttery), but still delicious. Just reduce baking time to 25-30 minutes since puff pastry bakes faster.