I don’t know what happened to the cake-o-phobe that used to live inside me. Creaming sugar with butter was a phrase that inflicted pure terror. Genoise-baking and torture seemed like stuff cut from the same cloth. Nowadays, there is nothing I enjoy more than baking entremet type cakes, which can be a bit intimidating. So many things can go wrong, and often do, especially when you are trying to learn by yourself, with the help of cookbooks, videos, and great virtual friends with endless patience (thank you, you know who you are). My most recent adventure coupled entremet and mirror glaze. Mirror mirror on the wall? No, thanks. I’d rather have it on the cake!
COFFEE-CARAMEL ENTREMET CAKE
(adapted from Keren’s Kitchen)
for the sable biscuit:
75 g unsalted butter, room temp
75 g dark brown sugar
¼ tsp salt
1/2 tsp instant coffee
2 egg yolks
100 g flour
100 g finely ground hazelnuts
6 g baking powder
for the ganache layer:
75 g dark chocolate (70%)
12 g unsalted butter
6 g honey
1 tsp vanilla extract
72 g heavy cream
for the caramel mousse:
7 g gelatine
37 ml water
150 g sugar
52 g glucose or corn syrup
67 ml water
¼ tsp salt
190 g + 375 g heavy cream
2 egg yolks
for the mirror glaze (adapted from Phil’s Home Kitchen):
2½ sheets (4g) of Platinum grade sheet gelatine
150 g liquid glucose
150 g granulated or caster sugar
100 g condensed milk
150 g white chocolate, chopped fairly small
gel food colouring
1 tsp coffee extract
Make the sable biscuit component. Heat oven to 350 °F and line a baking pan with parchment paper. In your stand mixer with beater attachment, beat together butter, sugar, salt and instant coffee. Mix until smooth. Add yolk and mix until combined. Then add flour, ground hazelnut and baking powder. mix until just incorporated. Divide the dough roughly in two pieces and roll each into a 3mm thick layer that you will cut as a circle, 5.5 inches in diameter.
Transfer the dough to a baking dish lined with parchment paper and bake for 10 to 15 minutes. While still warm, cut two 5.5 inch circles. Set the circles aside. Enjoy the trimmings, or save them for other uses (great crumbled on yogurt).
Chop the chocolate into small pieces and place in a bowl. Warm the cream in a small saucepan, until bubbles appear on edge of the surface. Pour over the chocolate, and let sit for 5 minutes. Combine the honey and butter and heat in the microwave until just melted. Mix to combine and set aside. Using a spatula, mix the chocolate in circular motion, then, add the melted butter and honey and mix to combine.
Let the ganache cool to room temperature until it’s quite thick, then add a layer to each reserved sable cookie. Refrigerate for 2 hours minimum.
Make the mousse. In a small bowl, mix gelatine and water (37ml) together and leave for 5 to 10 minutes until set. Meanwhile, in a sauce pan, mix together sugar, glucose (or corn syrup), water (67ml) and salt. Cook on medium high heat until you achieve a caramel syrup with deep amber color. Do not allow it to smoke or burn. Meanwhile, in another sauce pan, slightly the heat the 190 grams heavy cream, so when the caramel is done you can pour the cream right away. Carefully pour it in and mix well until fully combined
In another bowl, whisk the egg yolks. Then add a third of the caramel to the beaten yolks and beat quickly together to temper the yolks. Pour the mixture back into the caramel and stir well to combine. Continue stirring until it reaches 180-182 °F. Heat the gelatine in the microwave for 20 seconds until melted (do not boil it, if needed reduce the power of your microwave to 70% or so) and mix into the caramel cream. Pass the cream through a fine mesh strainer, and set it aside to cool to 113 F (about 45 C). When cooled, whisk the remaining heavy cream (375 g) into a stable, yet soft consistency (like yogurt). Then fold it in two additions into the caramel cream, until well combined.
Assembling the cake. Set the bottom part of your Silikomart mold (white part) on a baking dish that will fit in your freezer. Pour a third of the mousse into the Silikomart mold and tap it on the table to level the surface and destroy large air bubbles. Carefully insert one of the cookies right in the middle, with chocolate side facing down. Add the upper part of your Silikomart mold and make sure it’s locked in place. Add the rest of the mousse on top of that, but reserve some to fill in the sides and top. Place the second cookie, chocolate side down on the top and pipe the remaining mousse around the edges. Use a small spatula to secure the cream on top. Freeze overnight.
Make the mirror glaze. Put the water, sugar and liquid glucose in a small pan and bring to simmering point, stirring occasionally to dissolve the sugar. Remove from the heat and let it stand for about 5 minutes. This is the base syrup for the glaze. Meanwhile, soak the gelatine in some cold water for about 5 minutes. Squeeze out the excess water and stir into the hot water, sugar and liquid glucose mixture to dissolve. Stir in the condensed milk and the coffee extract.
Put the chocolate in a medium bowl and pour this hot mixture slowly over the chocolate, stirring gently to melt it, avoid making bubbles. A stick immersion blender works great, but you must keep the blades fully submerged at all times. If bubbles are present, pass the mixture through a fine sieve.
Leave the glaze uncovered for an hour at room temperature for the glaze to cooled and be slightly thickened: if it is too runny you will get too thin a layer on top, colours will not blend well and less glaze will cling to the sides of the cake. The ideal temperature to pour the glaze is 92 to 94 F. Once it is slightly above that (around 97 F), remove a small portion and add dark brown gel color to it, mixing well. Pour the un-dyed portion in a large measuring glass with a spout, add the dark brown mixture to it, mix with a chopstick just barely. Make sure it is at the correct pouring temperature. Remove the cake from the freezer, place on a rack over a baking sheet. If you like to make it easier to save leftover glaze, cover the baking sheet with plastic wrap, so that you can lift it and pour easily into a container.
Take a deep breath, and pour the glaze in a circular motion, starting at the center, making sure it flows homogeneously on all sides. Tap the rack gently to settle the glaze, and very gently and quickly run an off-set spatula on top of the cake to force excess glaze to run down the sides. Do that just once, or you will ruin the marble effect. Drips under the cake can be cleaned with a spatula or sharp knife. Let the glaze set at room temperature for 15 minutes, then place the glazed cake in the fridge for 2 to 3 hours. Use a hot knife to cut slices without compromising the glaze.
Leftover glaze can be frozen and re-used. The colors will obviously mix together, so you wont’ be able to repeat a similar marble pattern.
to print the recipe, click here
Comments: At the risk of getting some serious hate mail, I must tell you that entremets seem a lot harder to make than they are. Can you bake a cookie? Can you make a mousse? Well, that’s all you need to make this entremet in particular. The components are simple, most can be made in advance, then it’s just a matter of putting it all together, paying attention to a few details.
Let’s talk cookie base: In her recipe, Keren baked a single round sable cookie and sliced it in the middle, to form two layers. That in itself proves that she is a much MUCH more skilled baker than I am. That was simply not happening in the Bewitching Kitchen. Between you and me, confession: I did try it. It was a disaster, and I had to start all over and use a more straightforward method, baking two independent sables. When I do it again, I will make the cookies slightly thinner, for a cake with a higher proportion of mousse. The fact that the cookie dough takes a bit of baking powder makes them puff a little bit, so rolling the dough to about 3mm thickness should be perfect. You will end up with a bit more scraps of cookie dough left. They are great to nibble on, and even recalcitrant dogs will do amazing tricks for a little bite.
The mousse component: My biggest mistake until now was over-whipping the cream. Intuitively, I felt that beating the cream to a certain point (pretty well-formed peaks) was important to make sure the mousse would hold. Not the case. Watching the pros do it in videos was an eye-opening experience. The cream is whipped to the point of “melted ice cream” and that’s it. If you over-beat it, it affects the final structure once frozen and you might have some cracks and problems when un-molding the cake. Plus, the mouthfeel will be compromised, a perfect mousse texture needs the cream to be whipped just to that stage. Live and learn.
The Silikomart Eclipse Mold: I think it’s a great investment (and for 9 bucks, not at all bad) if you want to take your dessert-making up a notch. It is pretty straightforward to use. Keep in mind you will always be assembling the cake upside down, so what’s at the bottom of the mold ends up on top. There is a solid, white base, you fill it almost to the top with your layers of mousse, cake, biscuit, then place the top part over it. Then the final bits of mousse and a solid base will be added (although you can do a mousse-only concoction). The main thing to keep in mind is to make sure your mousse does not have air pockets near the surface that touches the mold. Go with the back of a spoon and delicately make sure to push the mousse on the sides. Another thing to keep in mind, is that your first layer of biscuit or cake will float on the mousse at the bottom – you must be gentle not to push it too hard down, or it will show on the surface of the cake. And do your best to keep it leveled. These are small details, but each one will affect the end result. It’s not easy to end up with a perfect entremet like the pros do at the drop of a hat. But it’s a fun adventure to tackle. Link to amazon here (I am not affiliated, will make no money from your purchase).
The mirror glaze: I am absolutely in love with this technique, and should thank Philip from Phil’s Home Kitchen (former Baking Addict) for his detailed tutorial and fail-proof recipe. Mirror glazes rely on gelatin to set. Gelatin is a tricky ingredient because you must use the right amount. A little less and your glaze won’t set. A little more and it will have a very unpleasant, rubbery texture. You also need to use the right gelatin – they all have a particular “bloom number” which is a measure of its strength or gelling power. Bloom numbers vary on a range of 30 to 325. Powdered gelatin is usually around 200, and sheet gelatin like Platinum is around 235. Obviously, the higher the bloom number, the less gelatin you need. But most recipes will tell you exactly which one to use, and there is some flexibility. For instance, in most applications, 180 and 200 can be used interchangeably.
The glaze is so much fun to work with! Two details are very important, though. Minimize bubbles when mixing the glaze, and use it at the right temperature over a frozen, very smooth surface. Mousse cakes are the top choice, as they are smooth by nature. To minimize the bubbles, one trick is to pass the glaze through a sieve before using. You can do it several times, actually, each time the bubbles will be popped as they go through the sieve. And then, the fun begins, with the endless possibilities to use colors and patterns. I used a two color glaze, most of it kept without any dye (the color was given by the coffee extract only) and a very small amount I colored dark brown with Americolor gel. Then I simply poured both in the same container, barely mixed them, and poured. It is magical… I am fully mesmerized by the process. Be prepared for additional mirrors showing up in the future. No, not on the wall…
What really matters in a cake is the taste, and I must say this one delivered big time! I was a bit worried about the coffee extract in the glaze, because those ingredients can have a pretty artificial taste. However, I did not want to mess too much with the formula, adding real coffee to it in a larger volume. I was pleasantly surprised by the result, though. Perfectly balanced, not a hint of artificial taste to it.
As you can see, it all worked reasonably well inside the Eclipse mold. My only issue is the thickness of the sable layer. Ideally, I would like to have it maybe 3/4 of that size, so that it would be more harmonious with the ganache layer and also the cake would slice better. Keep in mind that the mousse is delicate, so if you need to use too much force to cut the slice (because your biscuit layer is too thick or too hard), the whole structure will suffer. I think my favorite part of the cake was the caramel mousse. Once glazed, the cake must sit in the fridge for about 3 hours before serving. Yes, it is a labor of love, but without love, what’s the point?
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