Monday, April 20, 2009

Lemon Cream Tart

Last week was a big week... One of the biggest, you could say.

No. Nobody died. I just got a lot of flowers. I successfully defended my thesis and am now, officially "Dr. Psychgrad".

Thank God that's done with. I had been stressing about the defence since starting graduate school five and a half years ago.

For a celebration event, I made a tart. My first tart. I splurged on a tart and some tartelette pans.

I was ecstatic to find meyer lemons at the grocery store for the first time. Without a recipe in mind, I picked up a pack. I should make a point of encouraging the store management to continue bringing in meyer lemons.

I followed Dorie Greenspan's recipe for a lemon cream tart, a recipe she leared to make from Pierre Hermé

Lemon Cream
1 cup sugar
Finely grated zest of 3 lemons
4 large eggs
1/2 cup fresh lemon juice (from 4-5 lemons)
2 sticks plus 5 tablespoons (10-1/2 ounces) unsalted butter, cut into tablespoon-size
pieces, at room temperature

Getting Ready: Have an instant-read thermometer, a strainer and a blender (first choice) or food processor at hand. Bring a few inches of water to a simmer in a saucepan.

Put the sugar and zest in a large heatproof bowl that can be set over the pan of simmering water. Off the heat, rub the sugar and zest together between your fingers until the sugar is moist, grainy and very aromatic. Whisk in the eggs, followed by the lemon juice.

Set the bowl over the pan, and start stirring with the whisk as soon as the mixture feels tepid to the touch. Cook the lemon cream until it reaches 180 degrees F. As you whisk—you must whisk constantly to keep the eggs from scrambling—you'll see that the cream will start out light and foamy, then the bubbles will get bigger, and then, as it gets closer to 180 degrees F, it will start to thicken and the whisk will leave tracks. Heads up at this point—the tracks mean the cream is almost ready. Don't stop whisking or checking the temperature, and have patience—depending on how much heat you're giving the cream, getting to temp can take as long as 10 minutes.

As soon as it reaches 180 degrees F, remove the cream from the heat and strain it into the container of the blender (or food processor); discard the zest. Let the cream stand, stirring occasionally, until it cools to 140 degrees F, about 10 minutes.

Turn the blender to high (or turn on the processor) and, with the machine going, add the butter about 5 pieces at a time. Scrape down the sides of the container as needed as you incorporate the butter. Once the butter is in, keep the machine going—to get the perfect light, airy texture of lemon-cream dreams, you must continue to blend the cream for another 3 minutes. If your machine protests and gets a bit too hot, work in 1-minute intervals, giving the machine a little rest between beats.

Pour the cream into a container, press a piece of plastic wrap against the surface to create an airtight seal and refrigerate for at least 4 hours or overnight. (The cream will keep in the fridge for 4 days and, or tightly sealed, in the freezer for up to 2 months; thaw it overnight in the refrigerator.)

When you are ready to assemble the tart, just whisk the cream to loosen it and spoon it into the tart shell. Serve the tart, or refrigerate 'until needed.

Serving: It's a particular pleasure to have this tart when the cream is cold and the crust is at room temperature. Dorie also recommends a raspberry or other fruit coulis is nice, but not necessary; so is a little crème fraîche.

Storing: While you can make the lemon cream ahead, once the tart is constructed, it's best to eat it the day it is made. Serve with 1 9-inch tart shell made with Sweet Tart Dough, Sweet Tart Dough with Nuts or Spiced Tart Dough (see book), fully baked and cooled

Sweet Tart Dough
Makes enough for one 9-inch crust

1-1/2 cups all-purpose flour
1/2 cup confectioners' sugar
1/4 teaspoon salt
1 stick plus 1 tablespoon (9 tablespoons) very cold (or frozen) unsalted butter, cut into small pieces
1 large egg yolk

Put the flour, confectioners' sugar and salt in a food processor and pulse a couple of times to combine. Scatter the pieces of butter over the dry ingredients and pulse until the butter is coarsely cut in—you should have some pieces the size of oatmeal flakes and some the size of peas. Stir the yolk, just to break it up, and add it a little at a time, pulsing after each addition. When the egg is in, process in long pulses—about 10 seconds each—until the dough, which will look granular soon after the egg is added, forms clumps and curds. Just before you reach this stage, the sound of the machine working the dough will change—heads up. Turn the dough out onto a work surface and, very lightly and sparingly, knead the dough just to incorporate any dry ingredients that might have escaped mixing.

To press the dough into the pan: Butter a 9-inch fluted tart pan with a removable bottom. Press the dough evenly over the bottom and up the sides of the pan, using all but one little piece of dough, which you should save in the refrigerator to patch any cracks after the crust is baked. Don't be too heavy-handed—press the crust in so that the edges of the pieces cling to one another, but not so hard that the crust loses its crumbly texture. Freeze the crust for at least 30 minutes, preferably longer, before baking.

To partially or fully bake the crust: Center a rack in the oven and preheat the oven to 375 degrees F.

Butter the shiny side of a piece of aluminum foil and fit the foil, buttered side down, tightly against the crust. (Since you froze the crust, you can bake it without weights.) Put the tart pan on a baking sheet and bake the crust for 25 minutes. Carefully remove the foil. If the crust has puffed, press it down gently with the back of a spoon. For a partially baked crust, patch the crust if necessary, then transfer the crust to a cooling rack (keep it in its pan).

To fully bake the crust: Bake for another 8 minutes or so, or until it is firm and golden brown. (I dislike lightly baked crusts, so I often keep the crust in the oven just a little longer. If you do that, just make sure to keep a close eye on the crust's progress—it can go from golden to way too dark in a flash.) Transfer the tart pan to a rack and cool the crust to room temperature before filling.

To patch a partially or fully baked crust, if necessary: If there are any cracks in the baked crust, patch them with some of the reserved raw dough as soon as you remove the foil. Slice off a thin piece of the dough, place it over the crack, moisten the edges and very gently smooth the edges into the baked crust. If the tart will not be baked again with its filling, bake for another 2 minutes or so, just to take the rawness off the patch.

Sweet Tart Dough with Nuts: This dough has a slightly more assertive flavor than Sweet Tart Dough above, but you can use the two interchangeably. For the nut dough, reduce the amount of flour to 1-1/4 cups and add 1/4 cup finely ground almonds (or walnuts, pecans or pistachios).

Storing: Well wrapped, the dough can be kept in the refrigerator for up to 5 days or frozen for up to 2 months. While the fully baked crust can be packed airtight and frozen for up to 2 months, Dorie prefers to freeze the unbaked crust in the pan and bake it directly from the freezer—it has a fresher flavor. Just add about 5 minutes to the baking time.

Much like shortbread, and it's ideal for filling with fruit, custard or chocolate.

The simplest way to make a tart shell with this dough is to press it into the pan. You can roll out the dough, but the high proportion of butter to flour and the inclusion of confectioners' sugar makes it finicky to roll.

Verdict: Overall, I was impressed with the look of the tart. But, I found that the lemon cream filling was too sweet. Maybe it's the meyer lemons that makes it really sweet. But I can't imagine using a normal lemon - seems like it would end up being really tart.(no pun intended) I found the crust to be good-tasting, but a bit too hard to break apart with a spoon/fork. Chewing, it was fine. But, I probably shouldn't have pressed the dough into the pan as hard as I did. I would make the dough again, but probably try another filling that isn't as sweet. StumbleUpon


comebacknikki said...

Congratulations!! :)

Patsyk said...

First of all... CONGRATULATIONS! That's awesome!

the tart is so pretty, and I'm jealous that you found meyer lemons!

Steph said...

Congrats! What's kind of psych research do you do? The lemon tart looks so nice with those berries!

Julia said...

YAY! Congratulations!!

And glad to see you have a little time now for the important things! Your tart looks great!

Heather S-G said...

Congratulations...that is so cool! The tart is gorgeous...not sure if it was the Meyer Lemons fault or not, as I've still NEVER been able to find any :(

Ricki said...

Congratulations! Feels great, doesn't it??

And the tart is lovely!

Dewi said...

Well hey...hello there "Dr. Psychgrad", congratulation!
What a delicious tart for the celebration. I love lemon tart, it's probably my only favorite tart!

Ning said...

Congratulations, Dr Psychgrad! What a way to celebrate - with a delicious treat!

What's Cookin Chicago said...

Congratulations Dr. Psychgrad!! What a great achievement and a delicious way to celebrate!

Hopie said...

Dr Psychgrad - that has a nice ring to it! :-) Congratulations!! I love the idea of you buying tart pans to celebrate a successful thesis defense. That's my kind of celebration!!

Anonymous said...

Congratulations and the tart looks gorgeous!

Beth said...

Congratulations, Dr. Psychgrad!

OhioMom said...

Congrats Psychgrad!

The lemon tart looks wonderful.

Dharm said...

Well Done Dr!! Congrats and I must say that tart looks lovely - especially with all the berries on it...

kat said...

Congratulations what a great success & the tart looks good too!

MommyLisa said...

Wow - congratulations Doctor.

Now for the tart - a cup of sugar is quite a lot - and only against meyer lemons, butter and a few eggs. That would be VERY sweet. Most recipes I do for sweets only ask for 3/4 cup for a similar amount of product. I think it is the combo of lots of sugar AND the meyer lemons.

I love them.

Blood oranges too.

But they are sweeter.

That Girl said...

Congratulations Dr. Psychgrad!!!!

grace said...

so what do we call you now? psychgrad grad? dr psych? :)
congrats, and what a way to celebrate. :)

glamah16 said...

You go girl!

Melanie said...

The tart looks beautiful, despite it being too sweet. And congrats on defending your thesis. What an accomplishment!

Karen said...


pam said...

Congratulations Dr.!!

PG said...

Steph - experimental...sorry - can't get any more specific than that cause my area is pretty specific.

Lori Lynn said...

Whoo! Hoo! Congratulations!

The tart is very pretty, sorry to hear that it wasn't perfect, 'cause it sure looked like it.

Bunny said...

I always wante to make this tart just cause I love lemon. Congratulations!!

Lisa said...

Congratulations! Your tart looks lovely. Great way to celebrate.

Jeanne said...

Oh CONGRATULATIONS!! You must be so thrilled, and your mom so proud ;-) Love the celebratory tart too. I so wish Meyer lemons were more easily obtainable here in the UK...

Jennifer said...

Great job with the meyer lemons-I love making tarts and using my tart pans.

Valerie Harrison (bellini) said...

First of congratulations Dr. Psychgrad!!!!!!!! All of your hard work has paid off!! Also excellent choice for a celebration. Lemon is the new chocolate in my books:D

Jaime said...

isn't this tart amazing?! i love it!

Proud Italian Cook said...

What a HUGE accomplishment! Congratulations "Dr"!!
Your tart looks wonderful, but your future looks even better!
Cheers to you!