A birthday Zuger Kirschtorte for Vivienne
January 8, 2011 § Leave a comment
After a teeny bit of excess over Christmas, it seems it’s the time for reinvention and self improvement which in food terms seems to mean restraint and raw vegetables. Well I’m going to buck the trend and write about a cake I made in December for a friend’s special birthday. This was a Zuger Kirschtorte, a traditional almond and cherry liqueur flavoured cake from the canton of Zug in central Switzerland.
Click here to view a short movie featuring the whole process. The kitchen scenes were shot by my son George who provides that authentic edgy camera wobble.
The cake idea came from Rose Levy Beranbaum’s amazing book “The Cake Bible” and she calls it “A Taste of Heaven”, a light as air heart-shaped confection of crisp almond meringue discs sandwiching a cherry liqueur-sprinkled sponge, frosted with cherry-flavoured buttercream and finished with toasted almonds.
I discovered The Cake Bible a decade or so ago on the shelves of the Mayfair library on South Audley Street in London round the corner from where I worked at GEC’s head office on Stanhope Gate. When work pressures became too much I would occasionally seek sanctuary here at lunchtimes, leafing through the pages of Rose Levy Beranbaum’s book and marvelling at her descriptions of pistachio marzipan, white spice pound cake, orange fruit mousseline and the like.
It turns out that “A Taste of Heaven” is Ms Beranbaum’s version of the classic Swiss cake, a Zuger Kirschtorte. I find myself drawn to all things Swiss so it was funny I’d picked this cake not knowing its Swiss origins at the time.
The different components of the cake are two heart-shaped Dacquoise (nut meringue) discs; 1 Génoise Classique (whisked sponge) heart-shaped cake; syrup flavoured with kirsch for moistening the Génoise; kirsch flavoured buttercream; and finally a handful or so of toasted flaked almonds.
The crisp Dacquoise discs were spread with a thin layer of buttercream and used to sandwich the kirsch-syrup moistened Génoise. The top and sides of the cake were frosted with the remaining buttercream and the flaked toasted almonds were gently pressed around the sides of the cake.
I suggest just two changes to Ms Beranbaum’s recipe:
1) To halve the quantity of buttercream from the full heart attack-inducing 1 pound 9.25 ounces to a more modest 12.5 ounces.
2) If, like me, you like to avoid artificial food colouring, you can achieve a pink buttercream by beating into the mix 4-6 tablespoons of puréed cherry compôte instead of a few drops of red food colouring. This gives a gorgeous ever so slightly sour true cherry flavour to the buttercream.
I went ever so slightly over the top when I added the cherry purée to my buttercream and ended up with an in-your-face pink frosting which, I assure you, despite its garish looks, is 100% natural.
I give the recipe for the Génoise Classique below as this is arguably the most useful and versatile component of the cake. Ms Beranbaum’s special twists to the classic French recipe are to substitute browned butter (beurre noisette) for the usual plain melted butter and to use half cornflour half cake flour rather than just cake flour. If I were to attempt to reproduce here the recipes for all the cake components, plus all the advice and troubleshooting tips in the Cake Bible I’d be writing this post for days. If you are at all serious about baking I’d urge you to buy or borrow a copy.
I started by making the Dacquoise (nut meringue) discs. There was nowhere near enough mixture to pipe the heart shaped discs so instead I piped a border a few millimetres inside the template I’d drawn (to allow for a slight spreading of the mixture as it bakes) and spooned the meringue mixture into the centre and gently spread it to fill the outline using a small crank-handled palette knife.
This is how the cooked Dacquoise disc looked:
The next step was to make the Génoise Classique whisked egg sponge. Ms Beranbaum’s special twist is to fold in not ordinary melted butter but browned clarified butter. This imparts a subtle nutty depth of flavour to the finished cake. Here’s my browned butter and the dregs left behind to show the depth of toasting achieved without going so far as to burn the butter:
Ms Beranbaum’s other handy tips when making Génoise are to use a mixture of cornflour and cake flour and is to whisk a spoonful or so of the beaten egg mix into the melted butter before adding the butter to the main bowl. This certainly helps incorporation of the butter. Whenever I’ve made Génoise before I’ve always encountered the problem of the melted butter sinking to the bottom of the bowl which didn’t happen this time.
Here’s the bowl of butter and egg mix ready for incorporation, along with the flours, into the big bowl of super-foamy whisked egg:
The cake batter was carefully spooned into the prepared heart-shaped cake tin, base lined with a double thickness of baking paper. This is how the finished cake looked:
It wasn’t quite as deep as I was expecting so I decided not to attempt trimming it before drizzling with the kirsch-flavoured syrup.
The next major cake component was the cherry buttercream. Here are some of the raw ingredients – note the authentic Alpine butter for this Alpine cake (though my butter was in fact German rather than Swiss).
The Bonne Maman cherry compôte was a real find – intense sour cherry flavour, gorgeous colour and not too sweet. Definitely a new store-cupboard standby for whipping up a sauce for duck or adding to a pudding.
The buttercream is no mere amalgamation of icing sugar and butter. Looking at the recipe it’s immediately apparent that there is quite a low ratio of sugar to butter which means that the end result is silkily textured yet not too sweet. I began by beating a hot sugar syrup into my egg yolks, a slightly tense step without a sugar thermometer relying on the cold water test, speed and a bit of luck. The resulting mix if it all turns out right is a pale, foamy mass. The picture shows a 6 egg yolk quantity which turned out to be way too much for one cake.
The next step involves combining the egg yolk foam with the softened butter:
And the final step was to beat in the kirsch and sieved cherry compôte to flavour the buttercream and tint it a 100% natural totally girly pink:
A word of warning – do stick to Ms Beranbaum’s guidelines when it comes to beating in extras to buttercream: I went above her recommended ratios when beating in the water-based cherry compôte to the fat-based buttercream. Although it was fine at first, I set the bowl aside in a cool room to use later and, horror of horrors, when I attempted to beat the mixture to soften it it split! I managed to re-emulsify it by warming the bowl very gently, adding a little more sifted icing sugar and beating like crazy.
The end result was a beautifully flavoured, unusual cake, a welcome change from the current surfeit of chocolate (and would be a great choice for a Valentine’s Day treat too).
Recipe for Génoise Classique
From Rose Levy Beranbaum’s “The Cake Bible”. She says “Since this recipe first appeared in print in 1981, I have received more calls about it from readers than for any other recipe. Many say that for the first time in their lives they have succeeded in making the perfect génoise”. Praise indeed.
For a 9 inch by 2 inch round or heart shaped cake tin or 8 inch by 2 inch square cake tin, greased, bottom lined with parchment, and then greased again and floured.
37g clarified beurre noisette*
4 g vanilla extract
4 whole large eggs, 200g weighed without shells
50g sifted cake flour (not self raising)
*In a heavy saucepan melt 4 tablespoons butter over medium heat, partially covered to prevent splattering. When the butter looks clear, cook uncovered, watching carefully until the solids drop and begin to brown. Pour immediately through a fine strainer or a strainer lined with cheesecloth.
Preheat the oven to 350 degrees F (175 degrees C). Warm the beurre noisette until almost hot. Add the vanilla and keep warm.
In a large mixing bowl set over a pan of simmering water heat the eggs and sugar until just lukewarm, stirring constantly to prevent curdling.
Using the whisk beater, beat the mixture on high speed for 5 minutes or until triple in volume.
While the eggs are beating, sift together the flour and cornflour.
Remove 1 scant cup of the egg mixture and thoroughly whisk it into the beurre noisette.
Sift half the flour mixture over the remaining egg mixture and fold it in gently but rapidly with a large balloon whisk, slotted skimmer, or rubber spatula until almost all the flour has disappeared. Repeat with the remaining flour mixture until the flour has disappeared completely. Fold in the butter mixture until just incorporated.
Pour immediately into the prepared tin (it will be about 2/3 full) and bake 25-35 minutes, or until the cake is golden brown and starts to shrink slightly from the sides of the pan. (No need for a cake tester. Once the sides shrink the cake is done.) Avoid opening the oven door before the minimum time or the cake could fall. Test toward the end of baking by opening the door slightly and, if at a quick glance it does not appear done, close door back at once and check again in 5 minutes.
Loosen the sides of the cake with a small metal spatula and turn out at once onto a lightly greased rack.
Many Happy Returns Vivienne and here’s to the next decade!