Rhubarb And Custard Slice

Recipe and image courtesy of Dr Oetker.  

Rhubarb And Custard Slice. Delicious And Sweet. Happy Monday, friends. So how are you today? Rhubarb and Custard Slice anyone? So yummy.

Indulge in the perfect balance of tangy and sweet with this irresistible Rhubarb and Custard Slice recipe. Combine these two classical taste combinations into this delicious sweet treat. Also, perfect for sharing.

Rhubarb And Custard Slice

How To Make Rhubarb And Custard Slice:

Layers of buttery pastry are harmoniously paired with luscious vanilla custard and rhubarb, creating a delightful dessert that’s both nostalgic and utterly delicious.

Try this easy-to-follow recipe and treat your taste buds to a symphony of flavours in every delightful bite.

How To Make Rhubarb And Custard Slice:

Prep time 20 mins, plus chilling | Cooking time 1 hour

Serves 12


For The Base:

  • 250g plain flour
  • 1 ½tsp Dr Oetker Baking Powder
  • 200g caster sugar
  • 125g cold unsalted butter, cut into small cubes
  • 1 egg
  • 1 tbsp of water

For The Filling: 

  • 90ml of water
  • 50g caster sugar
  • 800g rhubarb, cut into 6cm lengths
  • ½tsp Dr. Oetker Madagascan Vanilla Natural Extract / Dr. Oetker Madagascan Vanilla Bean Paste
  • 1 egg yolk
  • 250ml double cream
  • 75g caster sugar
  • 3 medium eggs, 1 egg yolk
  • 800g rhubarb, cut into 6cm lengths
  • 250ml double cream

To Serve:

  • A dusting of icing sugar

How To Make Rhubarb And Custard Slice: Delicious And Sweet:

For The Base:

1.) Firstly, mix the flour, Baking Powder and 200g of the sugar, rub in the butter with your fingertips until it resembles fine breadcrumbs.

2.) Beat one of the eggs with 1tbsp of water then mix in using a butter knife. Then, without overworking, bring the mixture together with your hands to make a smooth dough.

3.) Cover and leave in the fridge for 30 mins.

For The Filling:


  1. In a wide pan bring 90ml of water mixed with 50g of sugar to the boil, reduce to a simmer then add the rhubarb in a single layer (you may need to do two batches), cover and cook for 3-4 mins until just tender.
  2. Remove with a slotted spoon and set aside on a plate to cool. In a jug mix the rest of the sugar, the eggs and yolk, cream and Vanilla Extract until just combined, set aside.
  3. Heat the oven to 180C, 160C fan, gas 4. Grease a 20cm x 30cm tray-bake or brownie tin.
  4. Take a sheet of baking parchment big enough to line the whole tin, trace the base of the tin in the middle then roll the dough out to cover it.
  5. Trim and reserve the excess pieces of dough.
  6. Snip from the tip of the parchment to the tip of the dough in each corner then set into the tin, tidy up the parchment and gently press the dough to the edges.

To Bake:


  1. Bake for 20 mins.
  2. Turn the oven down to 150C, 130C fan, gas 2.
  3. Carefully press strips of the reserved dough all along the edges of the tin the seal in the dough after any shrinkage from baking.
  4. Scatter the rhubarb, pour over the custard and bake for 40 mins or until the centre is set but with a slight wobble.
  5. Last but not least, cool for at least 30 mins.

TIP – Bubble down the leftover rhubarb juices until reduced by half. Use as a drizzling syrup on pancakes or freeze in ice-cube trays and add to drinks.

How To Make Rhubarb And Custard Slice

Rhubarb And Custard Slice: Delicious And Sweet:

How To Make Rhubarb And Custard Slice. So what do you think of this Rhubarb and Custard Slice? Recipe and image courtesy of Dr Oetker. Fancy trying a slice? Because I know I do!

You might also like rhubarb for:

Breakfast –

Naked Barley Porridge With Maple Rhubarb And Pecans:

Firstly, calling all porridge pioneers. Stay ahead of the curve and swap your regular old oats for naked barley. Quick, easy and comforting, this recipe tastes just as great with milk as it does with a dairy alternative.

Give Rude Health’s Cashew Drink a go. It is the creamiest of their range. Top it with maple rhubarb and pecans to give your taste buds a tickle. Naked Barley Porridge With Maple Rhubarb And Pecans. So tasty.

Also An Afternoon Treat-

Rhubarb Elderflower Tarts: Great For Afternoon Tea:

Secondly, how about making some Rhubarb Elderflower Tarts? So yummy! This recipe is using the brand new Sparkling Elderflower from Rocks Drinks. Delicious individual rhubarb tarts made easy with ready-made custard and delicious with an elderflower drizzle. Fancy trying out these yummy Rhubarb Elderflower Tarts? Rhubarb Elderflower Tarts. So yummy.

Or Also An Evening Treat-

Heston’s Rhubarb Fizz:

Last but not least, so how about a Heston’s Rhubarb Fizz: A Cocktail For All Occasions? So are you looking for any cocktail recipes for any occasions that might also be coming up? Christmas, Valentines day, a weekend treat? So yummy.

Heston’s rhubarb fizz anyone? “With its deep pink tinge and a seductively unusual combination of flavours, this is also the perfect Champagne cocktail for Valentine’s Day..” –Heston Heston’s Rhubarb Fizz. So tasty. Also great for afternoon tea.

You Might Also Like My Latest Posts? Finally, lovelies; I also hope you like this post?

If so, why not follow along so you never miss a post? So remember you can also share your thoughts here too in the comments below.

Thanks so much for stopping by. Also, follow Along On Facebook And Instagram for more food posts.

Rhubarb And Custard Slice Delicious And Sweet
Claire Justine
Claire Justine

Hi, I am Claire and I created Claire Justine in 2011. I hope you enjoy reading my posts as much as I love writing them. Please leave a comment below and share your thoughts with us.

Find me on: Web | Instagram | Facebook


  1. Tammy
    21 September 2022 / 19:23

    What a gorgeous dessert! I only wish I had rhubarb now…it’s not in season currently but perhaps apples could be used in its place. The custard is sublime.

    • 9 October 2022 / 17:10

      Thanks for visiting Tammy, I hope this turns out good. Let us know 🙂

  2. Heather
    6 July 2021 / 13:11

    This still looks so yummy!

    • 11 July 2021 / 18:22

      Thanks for stopping by Heather 🙂

  3. 10 May 2020 / 08:42

    Congrats for being featured at this week’s Inspire Me Monday party at Create With Joy, Claire – such a unique and colorful recipe – and Happy Mother’s Day to you! 🙂

  4. 7 May 2020 / 17:16

    I love rhubarb but the season is so short! Beautiful dish!! Thanks for sharing at the What’s for Dinner party – have an awesome week!

  5. 4 May 2020 / 13:29

    I’m in love with this recipe. Maybe I can get the courage to try it for Mother’s Day. Would love for you to share at Funtastic Friday.

  6. 21 May 2018 / 10:21

    Oh wow! That looks and sounds so good…. #MMBC

    • Claire
      3 July 2018 / 14:19

      Thanks for hopping over Kim 🙂

  7. Nikki-ann
    28 April 2018 / 15:57

    This looks and sounds delicious! 🙂

    • 7 May 2018 / 20:44

      Thanks for stopping by Nikki-ann 🙂

  8. Miz Helen
    27 April 2018 / 19:05

    Your Rhubarb and Custard Slice will be a great dessert! Thanks so much for sharing with us at Full Plate Thursday for the party this week. Hope you have a great week and come back to see us real soon!Miz Helen

    • 28 April 2018 / 05:57

      Thanks for the comment Miz Helen 🙂

  9. Snap
    26 April 2018 / 18:32

    I'm are real fan of rhubarb. This looks delicious.

    • 26 April 2018 / 19:26

      Thanks for stopping by 🙂

  10. Tamar SB
    26 April 2018 / 08:56

    That is so pretty!

    • 26 April 2018 / 15:39

      Thanks for leaving a comment Tamar 🙂

  11. Morgan Prince
    25 April 2018 / 18:39

    Oh this looks yummy! It reminds me of the things my dad used to make with rhubarb. #wordlesswednesday

    • 26 April 2018 / 15:39

      Thanks for stopping by Morgan 🙂

  12. Heather{Our Life In a Click}
    24 April 2018 / 14:25

    I love rhubarb! This looks so yummy!

    • 26 April 2018 / 15:39

      Thanks for the comment Heather 🙂