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Raspberry Jam Lamington Slice

A delightful dessert showcasing layers of crisp puff pastry, silky custard, and glossy raspberry jam, topped with nostalgic jam lamingtons, perfect for gatherings and afternoon teas.
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Prep Time 30 minutes
Cook Time 25 minutes
Total Time 4 hours 15 minutes
Servings: 9 pieces
Course: Dessert, Snack
Cuisine: Australian
Calories: 300
Ingredients Method Notes

Ingredients
  

Base and Custard
  • 1 sheet frozen puff pastry, just thawed
  • 140 g caster sugar
  • 100 g custard powder
  • 750 ml milk
  • 2 tsp vanilla essence
  • 50 g butter, chopped
Topping
  • 200 ml thickened cream
  • 1 tbsp water
  • 1 tsp gelatine powder
  • 155 g raspberry jam, warmed
  • 9 pieces jam lamingtons

Method
 

Preparation
  1. Preheat oven to 200 degrees C/180 degrees C fan forced. Line a baking tray with baking paper.
  2. Place pastry on prepared tray and cover with a sheet of baking paper. Top with another baking tray.
  3. Bake for 20-25 minutes or until pastry is golden and crisp. Remove from the oven, lift off the top baking tray and baking paper, and set aside to cool completely.
Custard Making
  1. Place sugar and custard powder in a saucepan. Gradually whisk in milk until smooth.
  2. Whisk in vanilla. Cook over medium heat, stirring constantly, for 5 minutes or until custard comes to the boil.
  3. Cook, stirring, for a further 2 minutes or until thickened. Whisk in butter.
  4. Cover the surface of the custard with baking paper and set aside for 5 minutes to cool slightly.
Assembling
  1. Line the base and sides of a 5cm-deep, 20cm square cake pan with baking paper, allowing paper to overhang the sides.
  2. Trim the pastry sheet to fit in the base of the pan, then place in base, flat-side down.
  3. Whisk cream into the custard until smooth. Pour over the pastry base and smooth the surface. Cool for 30 minutes.
  4. Place in the fridge for 4 hours, or overnight, to set.
Finishing Touch
  1. Place water in a small microwave-safe bowl. Sprinkle gelatine and stir to combine.
  2. Microave for 10 seconds (do not overheat). Use a fork to whisk until gelatine dissolves.
  3. Stir into jam, then spread evenly over the set custard layer and smooth the surface.
  4. Place in the fridge for 5-10 minutes, or until just starting to set (the top should feel sticky to the touch).
  5. Arrange lamingtons, touching, over the top of the jam layer. Return to the fridge for 20 minutes or until jam is set.
  6. Use the overhanging paper to lift the slice from the pan. Trim pastry and custard edges, if necessary. Cut into 9 pieces (between the lamingtons) to serve.

Notes

Serve chilled or slightly cool from the fridge, with a cup of strong tea or a mug of milky coffee. Each square is topped with a jam lamington, making them perfect for family gatherings.