Jostaberry Tart

JostaberryTart1Jostaberry is a hybrid cross of blackcurrant and gooseberry.  It is thornless and produces fruits which are slightly smaller than a gooseberry, dark like a blackcurrant but sweeter.  The plant I put in two years ago produced its first proper crop this year.  The bush will grow to 1.8m in height – so it can be a bit of a brute.  The label says to prune like a gooseberry.  The fruit seems to form on last year’s wood.  After harvesting I’ve pruned it quite hard.  This year I threw a net over the whole bush to keep the pigeons off.  This meant I could leave the fruit on the bush until it turned truly black.

The fruit ripened about the same time as the blackcurrants, so I made the decision to freeze the blackcurrants and use the jostaberries.  I made a tart with a sweet pastry base, crème pâtissière layer and then a jostaberry topping, inspired by the French tarte au myrtilles.

JostaberryTart2I was making it up as I went along but somehow managed to hit on what seemed, to us at least, the perfect combination of tart and sweet.  I promptly made another two batches of the topping from most of the remaining jostaberries before freezing the couple of handfuls left over.  I put the topping into Kilner jars, put one in the fridge and processed the second in a steam bath so that it should last in the cupboard for a treat in the winter.


Sweet pastry pie crust 9″/23cm – I made my own but you can always buy one.

Crème Pâtissière – one qty:
60g sugar
15g cornflour
a pinch of salt is traditional, but you might not bother.
2 egg yolks
250ml milk
1/4 teaspoon vanilla extract

400g Jostaberries
100g sugar
2 tsp arrowroot


Make the paste and fill the flan dish and bake off.

To make the cream mix the sugar, cornflour and salt.  Add the egg yolks and beat to a thick paste.  Heat the milk until it starts to simmer and then add one third of it to the egg mix whilst beating.  Pour this back into the pan with the remainder of the milk, again beating all the time and heat until it thickens.  Turn off the heat and add the vanilla extract and whisk a little as it cools.  Spread this into the pastry base and allow to cool.

Top and tail the jostaberries using scissors.  Put 150g of them in a pan with 100g sugar and a few drops of water.  This produces quite a tart topping, if your berries are not completely ripe or you prefer a sweeter topping use a little more sugar.  Heat gently until the the jostaberries soften and produce enough juice to dissolve the sugar.  Simmer for about 10 minutes, when the berries will start to disintegrate.  You should have richly coloured syrup.

Add the remaining berries, stir to coat and cover.  Cook on a very low heat for about 5 minutes stirring occasionally.  The second batch of berries should just soften, but not disintegrate.  Mix the arrowroot with a few tsp of water and add to the boiling berries whilst stirring.  As soon as the mixture thickens turn off the heat and stir for a few moments more.  Pour this topping over the prepared base and allow it to spread to the edge, helping it along if necessary.

Allow the tart to cool completely before serving.  The same topping would work wonderfully on a cheesecake.  We enjoyed ours sitting out in the garden on a slightly sticky Friday evening after a barbecue.

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9 Responses to Jostaberry Tart

  1. Julie Willard mixed media artist says:

    Hi mike would it work if Imixed black currants with gooseberries which I have both just picked? Julie

    Phone: 07549 276426 my blog: http//

    • Mike Evans says:

      Hi Julie, I’m thinking it would, especially if they are those red-tinged dessert gooseberries. Maybe if you made the initial syrup with blackcurrants and then dropped the gooseberries into it for the second part?

  2. gz says:

    jostas are,to put it mildly, vigorous growers, but also healthy plants!!
    I grew them in the 90s….thanks for reminding me…I think my daughter has a few plants she grew from cuttings then…must get her to do it again!

    • Mike Evans says:

      I made cuttings from the bush when I put it in as it was a bit of an odd shape. They all took so it seems to come from cuttings pretty easily because I didn’t do anything special.

  3. Susan says:

    Can’t wait till mine are ready to pick,getting very excited now.hope the pigeons keep off.😊

    • Mike Evans says:

      I have mine netted now. I’ve picked some blackcurrants but I think the jostaberries will be another week.

      • Mike Evans says:

        We picked the Jostaberries again last week and I made pie filling from them. Three batches went into Kilner jars and the rest has been sitting in the fridge until today when I made a tart and put it on the top. Jostaberry tart treats this weekend!

  4. Tony Fullbrook says:

    Just randomly googled jostaberry tart and am just making this now. I just noticed Mike is in Tonbridge and I am only in Hildenborough! Small world huh?


    • Mike Evans says:

      I don’t think mine are ripe yet this year. The blackcurrants look ready but I think the Jostaberry has been focusing on putting on more leaves than fruit. I’m planing to go to the allotment (down by Barden Lake) and check today.

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