Vanilla Slice

Vanilla Slice

  , ,

February 5, 2015

  • Prep: 30 mins
  • Cook: 1 hr


2 purchased sheets of read made puff pastry

250ml (1 cup) milk

1 vanilla bean, split ( I used vanilla essence instead) *note - 2tsp of essence is equivalent to one vanilla bean*

3/4 cup cornflour

1/2 cup custard powder

220g (1 cup) caster sugar

750ml (3 cups) thickened cream

50g unsalted butter

3 egg yolks

Icing sugar, to dust


1Step 1

2Preheat oven to 210C. Line a 23cm square pan with aluminium foil, so that the foil comes up over the sides (this allows you to lift out the slice).

3Step 2

4Place each pastry sheet on a baking tray lined with non-stick baking paper, then bake for 8-10 minutes or until golden brown. Set aside to cool.

5Once cool, place 1 pastry sheet, cooked-side up, in bottom of pan. (You may need to trim it slightly to fit.)

6Step 3

7Set slow cooker on high, I used a small one 2.4L

8Put the cornflour, sugar and custard powder in the slow cooker, and put the milk and vanilla mixture in and whisk until smooth,

9Then add cream, mix well.

10Place lid on slow cooker and let it cook for about 1 hour or until it thickens, stirring couple times in between.

11Add butter, stirring well to combine, then remove from heat and whisk in egg yolks, one at a time, until smooth.

12Step 4

13Pour into pastry-lined pan and set aside to cool slightly before placing other piece of pastry, cooked-side up, on top. Refrigerate overnight.

14Remove from pan, cut into squares and dust with icing sugar.

Submitted by Nancy Kleinig


30 Reviews

Katherine Elder

April 20, 2021

If I’m making this in a 7lt rectangular slow cooker I would need double the mix…correct???


September 13, 2020

So easy to make and so delicious. I used a larger tray so the slices aren’t as high and cut them into smaller portions. Family loved them.

Melissa Ottaviani

March 7, 2020

Was absolutely amazed with how well this recipe turned out., it’s always been a favourite in our household. If you haven’t tried it definitely give it a go you won’t regret it


February 16, 2020

Absolutely delicious! Just under 1 hour to cook the custard in my 7litre Slow Cooker. It went a little clumpy as I added some extra custard powder after the cream, it didn’t matter in taste 😁

I made it the traditional way by actually making up the icing (mix icing and boiling water in bowl, pour paste over slice THEN refrigerate) – it didn’t seem right to just dust it.

10/10 recipe. Will make this next time I have guests 😁🥰

Patricia Gould

July 29, 2019

Can you use saos instead of the puff pastry ?

Stephen Peters

July 29, 2019

Just want to know it says to whisk in egg yolks when still hot is this right thought it would scramble them pls help


July 23, 2019

My mixture doesn’t seem to be thickening? Anyone else had this?

shannon holyoake

May 30, 2019

Hi, if the slow cooker is bigger will it take longer??thanks

Rebecca Falso

April 29, 2019

Hi! Do you need to let the mix cool down before whisking in the egg yolks?

Pamela Davis kraaymaat

October 1, 2018

Thickened cream… so whatever cream you use in your country to beat with a fork or beater to make thicker to put on scones or sponge cakes etc

Jenny Semmler

September 29, 2018

Thickened cream is minimum 35% fat, and has gelatin added to make it thicker. It’s not like double cream or “pure” cream that has a much higher fat content.

Jodie Leemhuis

September 29, 2018

OMG Nancy this recipe is amazing!!! Best vanilla slice I’ve ever made 😋😍 I topped this with sc vanilla icing and was just like the bakery version 😋 thanks so much for sharing this with us xxx


July 24, 2017

What can be used to substitute the egg yolks?


May 22, 2017

for those asking what thickened cream is its also known as double cream, Recipe looks awesome will have to give it a try


May 14, 2017

Pauline whar is butterfat content of thickening cream maybe we can figure out from that no such product in canada
But we have coffee and whipping cream

In Australia it’s our regular pouring type cream


January 31, 2017

What is thickened cream??


July 5, 2016

Does this recipe fit 1.5 ltr slow cooker??

Katy Walker-Tassell

June 30, 2016



June 26, 2016

Have made this twice now. Delicious!! Kids love it.When cooking the pastry I put baking paper top and bottom and placed another tray on top to stop it rising. Have added this to my to keep recipes.


June 16, 2016

This is THE BEST vanilla slice EVER!! I’m having to make double batches now as it gets devoured so quickly

It’s a pouring cream in Australia

Danielle hoodless

June 10, 2016

What is thickened cream? Or is there a different kind of cream I can use?

Jane Jones

June 10, 2016

What is thickened cream ?


June 9, 2016

Has anyone tried with short crust pastry instead of puff?

Doug Hair

June 8, 2016

Cook for one hour … on low or high heat??


June 7, 2016

I made this the other night in my Russell and Hobbs 6L. It took nearly 2 hours to thicken which was incredibly frustrating but aside from that it was so easy to make and so worth it. Hubby took it to work and had at least three individuals approach him independently to say it was the best vanilla slice they have ever had!

Kel Dawson

April 3, 2016

Wow!!! Absolutely amazing!! First time cooking this and turned out fabulous!!

Julie Millington

February 28, 2016

Looks great

Rozi Pottsy

December 17, 2015

Better than from the Bakery
A really lovely recipe.
Note to self – Make double 🙂

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