Daring Bakers Challenge: Tiramisu

The February 2010 Daring Bakers’ challenge was hosted by Aparna of My Diverse Kitchen and Deeba of Passionate About Baking. They chose Tiramisu as the challenge for the month. Their challenge recipe is based on recipes from The Washington Post, Cordon Bleu at Home and Baking Obsession.

Tiramisù translates from Italian to mean “pull me up” or “pick me up”. And it is certainly true to its name! Layers of spongy savoiardi (ladyfingers) dipped in sweetened espresso, separated by layers of rich custard. Definitely a heavenly dessert!

Just like the tiramisù itself, this challenge was multi-layered. Everything was made from scratch over a span of 2 days. Savoiardi, mascarpone, zabaglione, pastry cream, whipped cream, and finally tiramisù! It’s really not as much work as it sounds, and it all culminates in a wonderful and well-deserved treat!

The February 2010 Daring Bakers’ challenge was hosted by Aparna of My Diverse Kitchen and Deeba of Passionate About Baking. They chose Tiramisù as the challenge for the month. Their challenge recipe is based on recipes from The Washington Post, Le Cordon Bleu at Home and Baking Obsession.

I do love the classic coffee-chocolate tiramisù and I always like to try out the original recipe first, just to make sure I can replicate it. Then I let my imagination run wild! Since blood oranges are currently in season, I decided to make a blood orange variation.

The blood orange tiramisù shown above was chilled in the fridge overnight. It’s more custard-like in texture than the traditional flavored tiramisù below, which I chilled in the freezer overnight.

The first part of the challenge was to make our own mascarpone cheese, one of the ingredients in the final tiramisù. It took a long time for the cream to reach the desired temperature on the stove, so I was nervous about the results. When I placed the cream in the fridge to drain overnight, it became rock hard and only a few drops of liquid had drained. But after sitting at room temperature for a little while, it was soft enough to stir.

Mascarpone Cheese
Yield: about 1 1/2 cups

1 pint organic whipping cream
1 tablespoon fresh lemon juice

Bring 1 inch of water to boil in a small pot. Reduce the heat to medium so that the water is simmering. Place the cream in a metal bowl and place the bowl over the pot of simmering water. Heat the cream, gently stirring, until it reaches at least 180°. If you don’t have a thermometer, look for small bubbles pushing their way to the surface.

Add the lemon juice and continue to stir gently until the mixture curdles. The cream will become thick and you will see streaks of clear whey where the spoon moves through the cream. Remove the bowl from the water and let it cool for 20 minutes.

Line a sieve with four layers of dampened cheesecloth. Transfer the mixture into the sieve. Do not press or squeeze the mixture through the cheesecloth, just let it set there until completely cool. Then cover the entire thing with plastic wrap and place in the fridge overnight. The next day it will be wonderfully creamy!

The next part of the challenge was to make the savoiardi/ladyfinger biscuits. These biscuits get soaked in sweetened coffee or fruit juice to create a cake-like layer in the tiramisù.

Savoiardi/Ladyfinger biscuits
Yield: about 25 biscuits (depending on size)

3 eggs, separated
6 tablespoons granulated sugar
3/4 cup cake flour, sifted (or 3/4 cup all purpose flour + 2 tbsp corn starch)
6 tablespoons confectioner’s sugar

Preheat oven to 350°. Line two baking sheets with parchment paper or spray with cooking spray.

Using an electric mixer, beat the egg whites until they form stiff peaks. Add the granulated sugar, gradually, continuing to beat until the egg whites become stiff, glossy, and smooth.

In a small bowl, beat the egg yolks lightly with a fork. Then gently fold them into the whipped egg whites, using a wooden spoon. Sprinkle the flour (and corn starch, if using) over this mixture, and fold it in gently, just until combined. If the batter is folded too much, it will deflate. Try to avoid this!

Using a plain circular pastry tip, or a ziploc bag with the corner snipped off, pipe the batter into strips 5″ long and 3/4″ wide. Leave about 1″ in between the strips on the baking sheet.

Sprinkle 3 tablespoons of the confectioner’s sugar over the piped batter and let sit for 5 minutes. Sprinkle the remaining sugar, then carefully tap the excess sugar off of the baking sheet. No need to get it all off, in my experience it doesn’t burn in the oven.

Bake for 10 minutes, then rotate the sheets and bake for an additional 5 minutes, or until the biscuits are golden brown and still soft. Place the baking sheets on a cooling rack for about 5 minutes, then remove the ladyfingers from the baking sheet and cool directly on the rack.

If making the biscuits ahead, store them in an airtight container until ready to use.

And now, the main event!

Tiramisù
Yield: 8 servings

Zabaglione:
2 egg yolks
3 tablespoons sugar
1/4 cup Marsala wine
1/4 teaspoon vanilla extract
1/2 teaspoon finely grated lemon zest

Vanilla pastry cream:
1/4 cup sugar
1 tablespoon all purpose flour
1/2 teaspoon finely grated lemon zest
1/2 teaspoon vanilla extract
1 egg yolk
3/4 cup whole milk

Whipped cream:
1 cup chilled organic whipping cream
1/4 cup sugar
1/2 teaspoon vanilla extract

To assemble the tiramisù:
2 cups brewed espresso, warmed (I used double strength instant coffee)
1/2 cup sugar
1/3 cup mascarpone cheese
36 savoiardi/ladyfinger biscuits (depending on size and shape of your dish)
2 tablespoons unsweetened cocoa powder

To make the zabaglione:
Heat water in a double boiler, or place a few inches of water in a pot to boil. Make sure you will be able to place a metal mixing bowl over the water without it touching the surface.

In a large metal bowl, whisk together the egg yolks, sugar, marsala, vanilla extract and lemon zest. Beat until the yolks are fully blended and the mixture looks smooth.

Place the bowl over the pot of simmering water, or pour the mixture into a double boiler. Cook over low heat, stirring constantly, for about 8 minutes or until it resembles thick custard. It may bubble a bit while it cooks.

Cool the mixture to room temperature and transfer it to a small bowl. Cover and place in the refrigerator for at least 4 hours, preferably overnight.

To make the pastry cream:
Combine the sugar, flour, lemon zest and vanilla extract in a medium heavy-bottomed saucepan. Add the egg yolk and half the milk, whisk until smooth.

Place the pan on the stove and cook on low heat, stirring constantly to prevent the mixture from curdling. Pour in the rest of the milk, a little bit at a time, still stirring constantly. Continue to cook the mixture until it becomes thick and begins to bubble, about 12 minutes. Ideally, it will have no lumps, but if it does you can just put it through a strainer.

Transfer the pastry cream to a bowl and let it cool to room temperature. Cover with plastic wrap and refrigerate until thoroughly chilled, preferably overnight.

To make the whipped cream:
Place your empty mixer bowl and beater into the fridge for about 30 minutes before whipping the cream. Add the cream, sugar, and vanilla extract. Beat with a mixer until it holds stiff peaks. Set aside.

Now you’ve got all the pieces, and you’re ready to put it together!

To assemble the tiramisù:
In a small bowl, whisk together the warm coffee and sugar. Set aside to cool.

In a large bowl, beat the mascarpone cheese with a spoon until smooth. This will make it easier to fold. Add the chilled zabaglione and pastry cream, stirring just until combined. Gently fold in the whipped cream and set this mixture aside.

Get your serving dish ready. An 8″ square dish will work, but feel free to use any other size or shape you’d like.

Dip the ladyfingers into the coffee mixture for about 1 second per side. They will be moist but not soggy. Immediately place the lady finger into the serving dish. Repeat this process, placing the ladyfingers as close to each other as possible, until the bottom of the dish is covered by a single layer of ladyfingers. If necessary, break the ladyfingers to ensure that the dish is completely covered.

Spoon half of the cream mixture (or 1/3 of the mixture if you want three layers) on top of the ladyfingers. Carefully spread the cream over the ladyfingers and all the way to the edges of the dish. Dip another layer of ladyfingers, line them up, then cover with a layer of cream. Repeat this process for as many layers as you desire (or until you run out of ingredients!).

Cover the tiramisù with plastic wrap and refrigerate overnight. The tiramisu will be more flavorful if it sits in the fridge for two or three days. It can also be frozen, which will facilitate neater slices.

Just before serving, garnish your tiramisu with cocoa powder sifted through a fine mesh strainer, or any other garnish of your choice.

For the blood orange variation:

Whisk together 1 cup warmed blood orange juice and 1/4 cup granulated sugar. Set this mixture aside to cool while you prepare the cream layer. Use this mixture to dip the ladyfingers, instead of the coffee mixture.

Make the zabaglione and pastry cream as above. Make the whipped cream, and then fold in 1/4 cup blood orange syrup (see recipe below) before mixing it with the zabaglione and pastry cream.

Blood Orange Syrup
Juice of 5 blood oranges
1/4 cup granulated sugar

Combine orange juice and sugar in a small saucepan. Bring to a boil, then reduce the heat and simmer for about 5 minutes, or until syrup has reached desired consistency.

Assemble tiramisù according to the instructions above, garnishing with extra syrup and orange slices.