Name: Classic Vanilla Slice Recipe
Prep time: 20 min
Cook time: 20 min
Total time: 1 h 40 min
Cuisine: International
Ingredients: 2 sheets store-bought puff pastry, thawed; Flour, for dusting; 2 cups whole milk; 1/2 cup granulated sugar; 1/4 cup cornstarch; 4 egg yolks; 1 teaspoon vanilla extract; 1 cup powdered sugar; 2-3 tablespoons milk; 1 teaspoon vanilla extract

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If you’re searching for a dessert that’s sure to make everyone swoon, you can’t go wrong with a Classic Vanilla Slice. This beloved treat is famous for its flaky, golden layers of puff pastry sandwiching a thick, silky vanilla custard, all topped with a luscious glaze that cracks gently when you cut into it. Each bite combines delicate crunch, creamy richness, and an irresistible vanilla aroma. Whether you’re reliving nostalgic memories or introducing friends to an Aussie favorite, this Classic Vanilla Slice will quickly become a treasured recipe in your own kitchen.

Classic Vanilla Slice Recipe - Recipe Image

Ingredients You’ll Need

The beauty of a homemade Classic Vanilla Slice lies in its straightforward, easy-to-find ingredients. Each component shines on its own, but together, the result is an unforgettable fusion of textures and flavors. Don’t be tempted to skip or swap — every item plays a crucial role in creating that iconic dessert experience.

Puff Pastry Sheets: Store-bought puff pastry takes the effort out of this recipe while still providing those signature, buttery layers.
Flour: Just a dusting is needed to help you roll your pastry smoothly and prevent sticking.
Whole Milk: Full-fat milk gives the custard its creamy texture and rich mouthfeel.
Granulated Sugar: Sweetens the custard without overpowering the natural vanilla flavor.
Cornstarch: The secret to a thick, sliceable custard that holds its place between the pastry layers.
Egg Yolks: Deliver extra richness and help thicken the custard while adding a gorgeous pale yellow color.
Vanilla Extract: Infuses both the custard and the glaze with that classic, deeply fragrant vanilla flavor.
Powdered Sugar: Blends into a perfectly smooth, glossy glaze for the finishing touch.
Milk (for glaze): Adjusts the glaze consistency so it’s easy to spread but won’t run off the top.

How to Make Classic Vanilla Slice

Step 1: Preheat Your Oven and Set Up

Before you do anything else, get your oven nice and hot at 400°F (200°C). While it heats, line a baking tray or dish with parchment paper to make cleaning up a breeze and to help lift out your finished Classic Vanilla Slice with ease. This is one of those moments where five minutes of prep pays off!

Step 2: Prepare and Bake the Puff Pastry Layers

Lightly dust your counter with flour, then roll out your first sheet of thawed puff pastry until it’s just a bit bigger than your baking dish. Place the pastry on your prepared tray and prick it all over with a fork — this helps keep it flatter and less puffy, giving you nice, even layers. Slide it into the oven and bake for 15 to 20 minutes, until beautifully golden and crisp. When done, let it cool completely before moving on.

Step 3: Whip Up the Silky Vanilla Custard

Time for the heart of your Classic Vanilla Slice! Start by gently heating the milk in a saucepan — you want it just starting to steam, not boiling. In a separate mixing bowl, whisk the granulated sugar, cornstarch, and egg yolks until perfectly smooth and slightly pale. Now, slowly pour the hot milk into your egg mixture, whisking like mad so you end up with custard instead of scrambled eggs. Pour everything back into the pot and stir over medium heat until the custard thickens and becomes glossy. Take it off the heat and stir in the vanilla extract. Let it cool slightly, but not so much that it firms up.

Step 4: Assemble the Layers

Once your pastry and custard have cooled, it’s time to bring the Classic Vanilla Slice together. Lay one baked pastry sheet in your dish, then generously spread the warm, thick vanilla custard over it in an even layer. Gently roll out the second sheet of pastry and lay it on top. Lightly press down to nestle the layers together. This sandwich of textures is what gives Classic Vanilla Slice its signature mouthfeel!

Step 5: Make and Add the Glaze

Whisk together the powdered sugar, a tablespoon of milk at a time, and the vanilla extract until smooth, lump-free, and just thick enough to spread. If it’s too stiff, add a splash more milk; too runny, a bit more sugar. Pour the glaze right on top of the second pastry layer and smooth it into every corner for that perfect finish.

Step 6: Chill and Slice

Now the hardest part — waiting! Refrigerate your assembled Classic Vanilla Slice for at least an hour. This chilling time lets everything set up beautifully, so those layers are distinct and easy to slice. When ready, use a sharp knife to cut neat squares or rectangles, making sure each piece has plenty of custard and pastry.

How to Serve Classic Vanilla Slice

Garnishes

For an authentic experience, Classic Vanilla Slice is beautiful just as it is, but you can dust the top with a whisper of extra powdered sugar for a snowy effect. Some folks like a sprinkle of finely grated white chocolate or even a few delicate edible flowers for a special occasion.

Side Dishes

Serve your Classic Vanilla Slice alongside a hot cup of tea or mellow coffee. It pairs beautifully with tart summer berries or a tangy passionfruit coulis, which balances the sweet, creamy filling. For an afternoon treat, add a dollop of softly whipped cream to each plate.

Creative Ways to Present

If you’re aiming to impress, try cutting your Classic Vanilla Slice into bite-sized cubes and nesting them in mini cupcake papers for party platters. For a bistro look, drizzle plates with dark chocolate sauce or serve each slice with a thin shard of caramelized sugar standing upright on top.

Make Ahead and Storage

Storing Leftovers

Store any leftover Classic Vanilla Slice in an airtight container in the refrigerator for up to three days. The pastry will continue to soften and soak up some custard, which some fans absolutely adore!

Freezing

Freezing isn’t recommended for a fully assembled Classic Vanilla Slice — the custard may separate, and the pastry can become soggy once thawed. For best results, freeze the baked pastry sheets and make the custard fresh when you’re ready to indulge.

Reheating

Classic Vanilla Slice is meant to be enjoyed cold or at room temperature. Reheating isn’t necessary, but if you prefer the custard just a bit softer, leave the slice out at room temperature for 15 minutes before serving.

FAQs

Can I use homemade puff pastry for Classic Vanilla Slice?

Absolutely! If you love making pastry from scratch, homemade puff pastry will deliver even more flavor and flakiness. Just make sure to bake it until thoroughly golden and crisp so it stands up to the custard.

Why did my custard turn lumpy?

Custard can go lumpy if the hot milk is poured too quickly into the egg mixture or if it’s heated too fast on the stove. Whisk constantly and add the milk in a steady stream to keep everything smooth.

What’s the best way to cut Classic Vanilla Slice cleanly?

Use a sharp, serrated knife and wipe it clean between slices. It also helps to chill the dessert thoroughly beforehand, which makes the custard firm enough for those neat, bakery-style squares.

Can I make Classic Vanilla Slice in advance?

Yes! Classic Vanilla Slice actually benefits from a few hours in the fridge to firm up. You can make it a day ahead, but for the best texture, enjoy it within 48 hours of assembling.

Is Classic Vanilla Slice safe for kids?

Definitely! With its simple, wholesome ingredients and classic flavors, kids usually love Classic Vanilla Slice as much as adults. Just be mindful of any food allergies, especially to eggs or gluten in the pastry.

Final Thoughts

Few desserts feel as impressive yet comforting as a Classic Vanilla Slice, and every homemade tray is sure to bring out plenty of smiles. Whether you’re a longtime fan or about to fall in love for the first time, there’s no better way to enjoy a timeless treat. Give it a try and see just how delicious and satisfying this classic can be!

Classic Vanilla Slice Recipe

★★★★★

5.1 from 25 reviews

Author: Mariam
Total Time: 1 hour 40 minutes
Yield: 8–10 servings 1x
Diet: Vegetarian

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Description

Indulge in the classic vanilla slice with layers of flaky puff pastry, creamy vanilla custard, and a sweet glaze. This recipe is a delightful treat for any occasion.

Instructions

Preheat the Oven: Preheat your oven to 400°F (200°C). Line a baking dish or tray with parchment paper.
Prepare the Pastry: Dust a clean surface with flour and roll out one sheet of puff pastry into a rectangle slightly larger than the baking dish. Transfer the rolled pastry sheet to the prepared baking dish. Prick the pastry all over with a fork to prevent it from puffing up too much during baking. Bake in the preheated oven for 15-20 minutes, or until golden brown and crisp. Remove from the oven and let cool.
Make the Vanilla Custard: In a saucepan, heat the milk over medium heat until it just starts to simmer. In a mixing bowl, whisk together the granulated sugar, cornstarch, and egg yolks until smooth. Slowly pour the hot milk into the egg mixture, whisking constantly to prevent the eggs from scrambling. Return the mixture to the saucepan and cook over medium heat, stirring constantly, until thickened. Remove from heat and stir in the vanilla extract. Let the custard cool slightly.
Assemble the Vanilla Slice: Once the pastry has cooled, spread the vanilla custard evenly over the baked pastry in the baking dish. Roll out the second sheet of puff pastry into a rectangle slightly larger than the baking dish. Carefully place the rolled pastry sheet over the custard layer, pressing down gently to adhere.
Make the Glaze: In a small bowl, whisk together the powdered sugar, milk, and vanilla extract until smooth. Adjust the consistency by adding more milk if needed.
Finish and Serve: Pour the glaze over the top layer of pastry, spreading it evenly with a spatula. Place the assembled vanilla slice in the refrigerator for at least 1 hour to set. Once set, use a sharp knife to cut the vanilla slice into squares or rectangles. Serve and enjoy!

Prep Time: 20 minutes
Cook Time: 20 minutes
Category: Dessert
Method: Baking
Cuisine: International