Masterclass: Chocolate ganache tart


Master pastry chef Catherine Adams has a light yet luscious dessert just made to crown the dining table.

You'll need

Grated dark chocolate, to serve   Sweet shortcrust pastry 190 gm plain flour 45 gm caster sugar 95 gm chilled butter, chopped 45 gm lightly beaten egg (just under 1 egg)   White chocolate cream 160 gm white chocolate, finely chopped 380 gm pouring cream, removed from the fridge 10 minutes before use 10 gm vanilla paste, or to taste   Dark chocolate ganache 120 gm dark chocolate (68%-70% cocoa solids), finely chopped 240 gm pouring cream 75 gm caster sugar 75 gm lightly beaten egg (under 2 eggs) 28 gm egg yolk (under 2 yolks)

Method

  • 01
  • For sweet shortcrust pastry, combine flour and sugar in a bowl, add butter and rub into flour until crumbs form.
  • 02
  • Add egg and mix until pastry just comes together (avoid overmixing). Pat into a disc, wrap in plastic wrap and chill (2-3 hours).
  • 03
  • Meanwhile, for white chocolate cream, melt chocolate in a heatproof bowl placed over a saucepan of water that’s been brought to the boil, then removed from the heat. Combine 110gm cream and vanilla paste in a small saucepan, bring to a simmer, then remove from the heat and stir into melted chocolate, mixing gently until smooth. Add remaining cream, stir to combine well, then cover with plastic wrap and refrigerate for 3 hours to chill.
  • 04
  • Preheat oven to 170C. Roll out pastry on a lightly floured surface to a 29cm round. Place in a 3cm-deep, 24cm-diameter tart tin, gently pressing into edges, and trim the top. Lightly prick pastry with a fork. Chill for 1 hour, then blind-bake pastry case until rim is light golden (20-25 minutes; see cook’s notes p177). Remove paper and weights and bake until base is dry and edges are golden (5-10 minutes). Cool to room temperature (1 hour).
  • 05
  • Reduce oven to 120C. For dark chocolate ganache, place chocolate in a bowl. Combine cream and sugar in a saucepan, bring to the boil, pour onto chocolate, stand for a minute, then stir until chocolate is melted and mixture is smooth.
  • 06
  • Add egg and yolk to dark chocolate mixture and stir until shiny.
  • 07
  • Pour dark chocolate mixture into tart case and bake until just set with slight wobble in the centre (40-45 minutes). Remove from oven, cool for 15 minutes, then remove from tart tin and cool to room temperature (1½ hours; refrigerate tart to speed up cooling).
  • 08
  • Whisk white chocolate cream to medium-firm peaks, avoiding overwhisking (if the cream becomes too thick, add more pouring cream and stir gently to loosen). Spoon mixture over tart, then garnish with grated chocolate. The tart can be refrigerated until chilled, or served as is. The tart will keep refrigerated for 2-3 days. If you make it ahead, add the white chocolate cream just before serving.

I love a chocolate tart that's rich and luscious with a crisp base and a billowy cream topping. The cream topping isn't classic, but balances the richness of the dark chocolate, and adds lightness.

The filling, a classic baked ganache, is easy to make, and the sweet shortcrust can be made ahead. I think a chocolate pastry is a bit too intense with a rich chocolate filling; this plain sweet crust adds a textural element that doesn't overpower the filling.

More Catherine Adams dessert recipes.

For the pastry, the butter is rubbed into the flour with your fingertips, then the egg just brings it together. Don't overwork it or the pastry will be tough and shrink. Flatten it into a disc so it's easier to roll out, then refrigerate it to rest; this allows it to relax and firm up, which makes it easier to handle when you're rolling it out.

Dust the bench lightly with flour; if you use too much it will get worked into the dough. Roll the pastry out to a couple of centimetres beyond the diameter of the tin; use the tin as a guide, lifting the pastry up the sides to check. To line the tin, roll the pastry over the rolling pin to lift it and unroll it into the tin, lightly press it into the edges to ensure there are no gaps, then trim the edges. Rest the pastry in the fridge so it relaxes, then prick it with a fork to prevent it puffing up when it's blind-baked.

The filling for this tart is cooked at a low temperature so we need to blind-bake the pastry case to ensure it's completely cooked - it won't continue to cook once the filling goes in the case. For blind-baking, some people use baking paper to line the case; I use foil, spraying the underside to prevent it sticking. For the weights, I use dried chickpeas - they have a nice weight, get right into the corners and don't stick. Blind-bake the pastry until it's set in the corners, then remove the weights and foil and bake until it's cooked through. If necessary, leave in the foil or paper lining while the base cooks completely to prevent the edges getting too dark. I loosely fold the foil over the top of the pastry for this very reason.

You can't really go wrong with the chocolate filling - a basic ganache with eggs added. I use a bittersweet chocolate with around 70 per cent cocoa solids; I find a lower percentage too sweet. This ganache has a large liquid-to-chocolate ratio, so it won't split when you combine the two. When you bring the cream and sugar to the boil, let the mixture rise up the sides - this means it's super-hot throughout and will easily melt the chocolate when it's poured over it. Give the bowl a jiggle to disperse the cream evenly through the chocolate, then stir it until it's smooth - I use a whisk and stir quite briskly from the centre, working outwards, until the mixture is smooth (don't whisk the mixture; that will create air bubbles that can pit the surface of the tart). Let the chocolate cream cool briefly, then mix a little of it into the eggs to warm them up a bit, then mix in the rest of the cream until the mixture looks shiny.

The filling is baked with just enough heat to set the protein of the egg; the chocolate will set as it cools. If it's baked at a higher temperature, the outside cooks faster than the centre. The texture of the filling once it's cooled is luscious, easy to slice, and light to eat. Cool it on the bench or refrigerate it if you're impatient.

The cream topping is made a few hours ahead and it's in the fridge ready to go once the tart is cooled. White chocolate adds body and depth of flavour to the cream; you could also use milk chocolate if you prefer. We all know white chocolate is not chocolate, but I like the flavour here. For a different and deeper flavour, caramelise the white chocolate first by placing it in a heatproof bowl in an oven on low heat for a couple of hours. To melt the white chocolate for this recipe, don't put it on a saucepan of boiling water; rather, bring the water to the boil, then turn off the heat and sit the bowl on top. If the heat is too high, the chocolate seizes up and becomes grainy. Because you're adding a lot of cream to it, if it does seize, don't worry too much - just continue adding the cream and it will loosen up. The white chocolate cream is refrigerated for three hours; it needs to be chilled when it's whisked, or, again, it will become grainy.

If you serve the tart on the same day you make it, don't bother refrigerating it, but it's a great do-ahead dessert. It keeps well in the fridge, minus the white chocolate cream, for a couple of days; take it out of the fridge about 20 minutes before you serve it. The white chocolate cream goes on at the last minute, and just for extra measure I top it with a sprinkling of grated chocolate for a nice bit of texture. Fancy it up with curls of chocolate if you like, and enjoy it at any time of day, even as a midnight snack - if there's any left over.


At A Glance

  • Serves 8 - 10 people
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At A Glance

  • Serves 8 - 10 people

Additional Notes

For accuracy, Catherine Adams gives all measurements in grams.

Featured in

Apr 2017

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