Opera Cake!

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I have completed my first daring bakers challenge!  It went very well and only took me three and half hours to complete.  I think thats a really good time.  I made sure that the little man was safely in bed before starting because it makes doing anything in the kitchen about a hundred times harder with him under my feet. 

I decided to make an almond cake with lemon syrup and a layer of strawberries, lemon-vanilla butter cream and white chocolate mousse and ganache.
 

I started with the butter cream because I was sure that was the area I was going to screw up.  Thankfully, it worked the first time!  It also means that I have two and half pounds of unsalted butter in my fridge.  Good thing I really like to bake!  The butter cream was delicious, I had splurged and bought two vanilla beans just for the occasion.  I still haven't figured out what the other bean will be used in.  Maybe some vanilla ice cream or something that will showcase it's fabulous flavor!  Any ways I was very impressed with the butter cream and would definitely try it again!

The almond cake was OK, I did enjoy it but it was definitely not the best cake I had ever made.  I had decided that in order to save some money I would make the almond meal myself and I think it worked really well.  It just wasn't my favorite cake.  I think what made me not be super excited about it was the eggs in it.  There was a lot of eggs.  I thought I could taste eggs a little so that might be why it wasn't my favourite.   

The lemon syrup was good, not much too it.  Worked the first time.  Although, I didn't notice that the heat was really up so when I added the sugar it bubbled up like a volcano! 

The white chocolate mousse and ganache was really good.  I am not usually a white chocolate fan but I thoroughly enjoyed both areas of this cake.  My husband, who is a white chocolate fanatic thought it was really good.  Easy to make and was definitely worth the effort.

Overall, I enjoyed the challenge and look forward to the next Daring Bakers challenge!  Never would have thought of making an Opera Cake on my own.  I don't know that I would make it in this flavor combination again.  I would definitely try the coffee/chocolate combination it is made with traditionally.  My two favorite things in one cake, how could you go wrong?!

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The Daring Bakers’ Opéra Cake
Adapted from Dorie Greenspan’s Paris Sweets and Tish Boyle’s and Timothy Moriarty’s Chocolate Passion.

For the joconde:

6 large egg whites, at room temperature
2 tbsp. (30 grams) granulated sugar
2 cups (225 grams) ground blanched almonds
2 cups icing sugar, sifted
6 large eggs
½ cup (70 grams) all-purpose flour
3 tbsp. (1½ ounces; 45 grams) unsalted butter, melted and cooled

Divide the oven into thirds by positioning a rack in the upper third of the oven and the lower third of the oven.

Preheat the oven to 425◦F. (220◦C).

Line two 12½ x 15½- inch (31 x 39-cm) jelly-roll pans with parchment paper and brush with melted butter.

In the bowl of a stand mixer fitted with the whisk attachment (or using a handheld mixer), beat the egg whites until they form soft peaks. Add the granulated sugar and beat until the peaks are stiff and glossy. If you do not have another mixer bowl, gently scrape the meringue into another bowl and set aside.

If you only have one bowl, wash it after removing the egg whites or if you have a second bowl, use that one. Attach the paddle attachment to the stand mixer (or using a handheld mixer again) and beat the almonds, icing sugar and eggs on medium speed until light and voluminous, about 3 minutes.

Add the flour and beat on low speed until the flour is just combined (be very careful not to overmix here!!!).

Using a rubber spatula, gently fold the meringue into the almond mixture and then fold in the melted butter. Divide the batter between the pans and spread it evenly to cover the entire surface of each pan.

Bake the cake layers until they are lightly browned and just springy to the touch. This could take anywhere from 5 to 9 minutes depending on your oven. Place one jelly-roll pan in the middle of the oven and the second jelly-roll pan in the bottom third of the oven.

Put the pans on a heatproof counter and run a sharp knife along the edges of the cake to loosen it from the pan. Cover each with a sheet of parchment or wax paper, turn the pans over, and unmold.

Carefully peel away the parchment, then turn the parchment over and use it to cover the cakes. Let the cakes cool to room temperature.

For the soaking syrup:

½ cup (125 grams) water
⅓ cup (65 grams) granulated sugar
1 to 2 tbsp. of the flavouring of your choice (i.e., vanilla extract, almond extract, cognac, limoncello, coconut cream, honey etc.)

Stir all the syrup ingredients together in the saucepan and bring to a boil.

Remove from the heat and let cool to room temperature.

For the buttercream (The recipe for the buttercream that is listed here is based on the original. When testing the buttercream, we tested a slightly modified version that had 2 cups sugar, ½ cup water and 1¾ cups butter. The eggs remained the same. We ended up with a very creamy buttercream. But we don’t want anyone to be afraid of our modified version so you have the option of using the original above or the quantities we’ve listed here in this note):

1 cup (100 grams) granulated sugar (Used to say 2 cups but should be 1 cup)
¼ cup (60 grams) water (Used to say ½ cup but should say ¼ cup)
seeds of one vanilla bean (split a vanilla bean down the middle and scrape out the seeds) or 1 tbsp. pure vanilla extract
1 large egg
1 large egg yolk
1¾ sticks (7 ounces; 200 grams) unsalted butter, at room temperature (Used to say 1¾ cups of butter but it should be 1¾ sticks).
flavouring of your choice (a tablespoon of an extract, a few tablespoons of melted white chocolate, citrus zest, etc.)

Combine the sugar, water and vanilla bean seeds or extract in a small saucepan and warm over medium heat just until the sugar dissolves.

Continue to cook, without stirring, until the syrup reaches 225◦F (107◦C) (Note: The original recipe instructs to heat the syrup to 255◦F (124◦C). We heated it to 225◦F and it worked just fine. However, if you are concerned, then by all means heat your syrup to 255◦F.) on a candy or instant-read thermometer. Once it reaches that temperature, remove the syrup from the heat.

While the syrup is heating, begin whisking the egg and egg yolk at high speed in the bowl of your mixer using the whisk attachment. Whisk them until they are pale and foamy.

When the sugar syrup reaches the correct temperature and you remove it from the heat, reduce the mixer speed to low speed and begin slowly (very slowly) pouring the syrup down the side of the bowl being very careful not to splatter the syrup into the path of the whisk attachment. Some of the syrup will spin onto the sides of the bowl but don’t worry about this and don’t try to stir it into the mixture as it will harden!

Raise the speed to medium-high and continue beating until the eggs are thick and satiny and the mixture is cool to the touch (about 5 minutes or so).

While the egg mixture is beating, place the softened butter in a bowl and mash it with a spatula until you have a soft creamy mass.

With the mixer on medium speed, begin adding in two-tablespoon chunks. When all the butter has been incorporated, raise the mixer speed to high and beat until the buttercream is thick and shiny.

At this point add in your flavouring and beat for an additional minute or so.

Refrigerate the buttercream, stirring it often, until it’s set enough (firm enough) to spread when topped with a layer of cake (about 20 minutes).

For the ganache/mousse:

7 ounces white chocolate
1 cup plus 3 tbsp. heavy cream (35% cream)
1 tbsp. liquer of your choice (Bailey’s, Amaretto, etc.)

Melt the white chocolate and the 3 tbsp. of heavy cream in a small saucepan.

Stir to ensure that it’s smooth and that the chocolate is melted. Add the tablespoon of liqueur to the chocolate and stir. Set aside to cool completely.

In the bowl of a stand mixer, whip the remaining 1 cup of heavy cream until soft peaks form.

Gently fold the whipped cream into the cooled chocolate to form a mousse.

If it’s too thin, refrigerate it for a bit until it’s spreadable.

If you’re not going to use it right away, refrigerate until you’re ready to use.

For the glaze:

14 ounces white chocolate, coarsely chopped
½ cup heavy cream (35% cream)

Melt the white chocolate with the heavy cream. Whisk the mixture gently until smooth.

Let cool for 10 minutes and then pour over the chilled cake. Using a long metal cake spatula, smooth out into an even layer.

Place the cake into the refrigerator for 30 minutes to set.

Stories: 

Comments

Well done... bravo bravo

Your cake looks so good!! Yummy!! Bravo!

Your cake is beautiful! I agree, I probably won't make it again. It was all about the challenge, right?

Your so right!  I never would have even attempted it without it being a Daring Baker's Challenge.   I'm so glad I tried it.

Well done! What a delightful looking cake, and I love your use of fresh fruit . . . yum!

I too had to make use of naptime to complete it! Boiling sugar syrups and babies underfoot just don't go well hand in hand. Congratulations on a great cake!

Best,
Sarah

Welcome to the Daring Bakers. Great flavours to a lovely cake. I'm planning to make this cake in its traditional version, too.

Sounds like a great flavor combination. I love the border and drop shadow on the pictures - very professional!

Yay! Welcome to the group :)

Your cake looks amazing and I am glad that everything turned out well for you.. and you are sooo lucky to have those 2 pounds of unsalted butter kicking around... just imagine all of the yummy things you'll make with that yuuum!!
Welcome to the Daring Bakers and I hope you have lots of fun with us!

Congrats on your first challenge. It looks fabulous!

What a first challenge! Great job.

Your strawberries and lemon opera cake looks fab!
Shari@Whisk: a food blog

Gorgeous cake! I can't believe it only took you 3.5hrs! You are a miracle-worker in the kitchen. Congrats on becoming a DBer... hope to see more amazing bakes in the future :)

Great job on your first challenge. It looks really good and strawberry lemon sounds yummy!

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