Directions
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).
3
4Step 2
5Place 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.
6Once cool, place 1 pastry sheet, cooked-side up, in bottom of pan. (You may need to trim it slightly to fit.)
7
8Step 3
9Set slow cooker on high, I used a small one 2.4L
10Put the cornflour, sugar and custard powder in the slow cooker, and put the milk and vanilla mixture in and whisk until smooth,
11Then add cream, mix well.
12Place lid on slow cooker and let it cook for about 1 hour or until it thickens, stirring couple times in between.
13Add butter, stirring well to combine, then remove from heat and whisk in egg yolks, one at a time, until smooth.
14
15Step 4
16Pour into pastry-lined pan and set aside to cool slightly before placing other piece of pastry, cooked-side up, on top. Refrigerate overnight.
17Remove from pan, cut into squares and dust with icing sugar.
Submitted by Nancy Kleinig
29 Reviews
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
Debbie
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
Rebbecca
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
Alecia
July 24, 2017
What can be used to substitute the egg yolks?
Emma
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
Marie
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
Paulene @ Slow Cooker Central
February 1, 2017
In Australia it’s our regular pouring type cream
glenda
January 31, 2017
What is thickened cream??
lee
July 5, 2016
Does this recipe fit 1.5 ltr slow cooker??
Katy Walker-Tassell
June 30, 2016
YUM!!
Justin
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.
sarah
June 16, 2016
This is THE BEST vanilla slice EVER!! I’m having to make double batches now as it gets devoured so quickly
Paulene @ Slow Cooker Central
June 11, 2016
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 ?
Sref
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??
Keryn
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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Joanne
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.