Rhubarb Panna Cotta Tart

April 30, 2014

Big changes are afoot in my household. Remember that nasty kitchen sink leak I told you guys about last week? It turns out, my prediction was right — it's going to be a monster to fix, requiring that I tear out the entire right side of my kitchen. I have mixed feelings about this. On the one hand, it's an excuse to redo the kitchen to look like the ones that I've been daydreaming about and admiring on Pinterest (Subway tile, carrera marble countertops and brass fixtures! Modern amenities like a garbage disposal, a hood and a dishwasher!). But on the other, I recognize the realities of the 3-month-long construction on both my well being and, more importantly, my bank account.

I'm meeting with two contractors this coming Wednesday to scope out the project. So far it's been discouraging, considering that I've reached out to four contractors. One hasn't replied (despite it being a week and a half), and the other snottily waved me off, stating that his projects usually cost twice the amount of my budget and that I best stick to a DIY/Ikea kitchen. Yikes. Pretentious much? I love Ikea, and what he was implying was pretty insulting, especially considering that I'm working with a budget that most people on Apartment Therapy's Renovation Diaries series seem to be working with. Like, okay, yeah, I'm not a millionaire, but who is?

Regardless of what happens with the contractors this week, I want to take advantage of some of the early spring rhubarb that I'd seen in the Portland Farmer's market. Because assuming I'm actually able to find contractors willing to work with me and my wants, it will leave me without a kitchen for a good quarter of the year. That means no baking for three whole months, most likely during this upcoming summer. Which is really too bad, because summer in Portland is abundant with all kinds of amazing fruits and vegetables that yield beautiful baked goods. This rhubarb panna cotta is just the start:

Today's recipe comes from Herriot Grace, a blog that I've admired for a long time now. For those of you who follow me on Pinterest, you'll know that I frequently post recipes to my "Eat Well" board. Most of these recipes are ones that I hope to make one day, but some are definitely aspirational — that is, recipes that I don't have the time, energy, or skills to make. Things like these bear hug biscuits or, really, any macaron recipe that I pin considering I seem to have a mental block and my macarons always come out broken and cracked.

For a long time, I was intimidated to make panna cotta. The fact that it used gelatin freaked me out — I didn't understand how it worked and thought that it was a weird, alien substance made of horse hooves and other scary things. But as I started leaning more and more on cookbooks, I realized that many of my favorite pastry chefs used it a lot in their recipes. It's an ingredient that gives heavy, rich creams the structure it needs to hold a cake together (see: this epic chocolate chip cake from Momofuku Milk Bar). Last summer, I made this buttermilk panna cotta to get over my irrational fear and realized that there's nothing to be scared of here. Panna cotta is surprisingly easy to make, even easier than some of the cookies and cakes you seen on this blog. The super simplified process is this: you cook cream and sugar together, stir in some gelatin, and let it set in the fridge.

Last year, when I pinned this rhubarb panna cotta tart recipe from Herriot Grace, I was amazed. I'd never seen panna cotta in a tart shell, thinking that it only came in cups or inverted from molds onto plates. At the time, the tart seemed so glamorous, sophisticated and completely unattainable to me. It seemed like the sort of thing that would be impossible to make at home.

And while I still think the tart is glamorous and sophisticated, it's not unattainable anymore. I used my favorite foolproof brown butter tart shell recipe and the rest— the panna cotta, the vanilla roasted rhubarb —came together in less than an hour. This is a beautiful and delicious dessert that even beginners can make, and one that everybody will enjoy. I promise.

Some baker's notes:
  • The trick to making a good panna cotta is understanding how to bloom gelatin. In order to incorporate gelatin into a mixture, it must first be softened or "bloomed". Bloom powered gelatin by sprinkling it evenly onto the surface of a small amount of cold water. You must sprinkle the gelatin evenly — if you pour it into a pile on top of the water, the granules in the center will remain had and will not bloom. If you use too much water to bloom the gelatin, it will dilute the flavor of the recipe and its consistency will be too loose and wobbly. Be sure to use the exact amount of water specified in the recipe! Once the gelatin is bloomed, you need to dissolve the gelatin in hot — but not boiling — liquid. If the gelatin gets too hot, it will lose its strength and you will have to start over again.

  • The panna cotta recipe used in this recipe, adapted from David Leibovitz, is a bit firmer than I ordinarily like. But it's the perfect texture to compliment the crust and it won't result in a soggy tart. Once you've poured the panna cotta in to the tart shell, the crust will remain crispy for 24 hours — it's best to serve it on the day it's made. It will soften and still taste good, but it's not the same. I suggest making the tart shell first, followed by the panna cotta. Once you've poured the panna cotta into the tart, allow it to set in the fridge as you roast the rhubarb. The freshly roasted, warm rhubarb contrasts beautifully with the chilled panna cotta and brown butter crust.

Rhubarb Panna Cotta Tart
(Adapted from Herriot Grace)




Special Equipment:

For the Brown Butter Tart Shell:
(makes a 14 x 5-inch rectangular tart)
  • 6 tablespoons unsalted butter, cut into 1-inch cubes
  • 3 tablespoons water
  • 1 tablespoon granulated sugar
  • 1 tablespoon vegetable oil
  • a pinch of salt
  • 5.5 ounces all-purpose flour

For the Vanilla Bean Panna Cotta:
(makes enough for one tart, but you might have a ramekin's worth extra)
  • 2 cups heavy cream
  • 1 vanilla bean
  • 1/4 cup granulated sugar
  • 2 1/2 teaspoons (1 envelope) powdered gelatin 
  • 3 tablespoons cold water

For the Roasted Vanilla Rhubarb Topping:
(makes around 2 cups, enough for one tart)
  • 1 pound rhubarb, trimmed and sliced into 1-inch thick pieces
  • 1/2 cup granulated sugar
  • 1/4 cup red wine (I used pinot noir)
  • 1 vanilla bean


For the Brown Butter Tart Crust:
  1. Center a rack in the oven and preheat to 410 (F).

  2. In a Pyrex type oven-safe bowl, combine 6 tablespoons unsalted butter, 3 tablespoons water, 1 tablespoon granulated sugar, 1 tablespoon vegetable oil, and a pinch of salt.

  3. This is going to sound weird, but place the bowl in the preheated oven for 15 minutes, until the mixture is boiling and the butter starts browning.

  4. After 15 minutes, remove from the oven, and add 5.5 ounces of flour quickly, by spooning in flour in 1 tablespoon sized chunks. Use a heatproof rubber spatula to stir in the flour until it pulls off the sides of the bowl. The mixture is gonna bubble and smoke, but trust the recipe!

  5. Once the dough is cool enough to touch, use the back of your hand to flatten out the dough onto your tart pan, using your finger tips to mold the dough up into the corners and sides of the pan. It will feel a little greasy and kinda unpleasant (the dough has the texture of mashed potatoes), but go with it. Once all the pans are lined, use a fork to poke several holes into the crust.

  6. Place the tart pan on a baking sheet and bake at 410 (F) for 15 minutes, or until the crust is light brown and starts to appear flaky. Once it does, remove carefully from oven and let rest on a wire rack. This crust is very forgiving — it should have hardly any cracks. If you are worried about cracks, you can reserve some of the dough to press into any cracks that might appear after the baking process — the residual heat from the freshly baked tart will bake the dough accordingly and patch up your crust. Once the crust is completely cooled, it is ready for filling.

For the Vanilla Bean Panna Cotta:
  1. Combine 2 cups heavy cream and 1 vanilla bean in a heavy bottomed saucepot. Split the vanilla bean lengthwise and scrape the seeds into the cream, whisking gently until the seeds are fully incorporated throughout the cream. Throw in the vanilla bean pods and cook the mixture over medium heat until it begins to just simmer and the cream smells fragrant. Remove from heat and cover, allow the vanilla bean to infuse the cream for 30 minutes.

  2. After 30 minutes, fish out the vanilla bean pods. Add 1/4 cup granulated sugar and reheat over medium heat. Don't let it come to a boil; you want it to heat just until the sugar is dissolved and the mixture is uniformly hot (but not boiling) throughout. Remove from heat and allow to cool slightly.

  3. While the mixture is cooling, bloom the gelatin. Sprinkle 2 1/2 teaspoons powdered gelatin over the surface of 3 tablespoons water in a small bowl. Let stand for around 5 minutes, until the granules have softened completely, before scraping out into the cream mixture and whisking until the gelatin is completely dissolved. Let cool slightly for another 10 minutes, before pouring carefully into the brown butter tart crust. Transfer to the refrigerator and allow to set for at least 2 hours, until the panna cotta is firm.

For the Roasted Vanilla Rhubarb Topping:
  1. Preheat the oven to 350 (F) — if you're making the filling immediately after baking the shortcakes, your oven should already be ready.

  2. Place 1 pound chopped rhubarb in a 9 x 13 inch baking pan. In a small bowl, whisk together 1/2 cup granulated sugar and 1/4 cup red wine — don't worry if it doesn't dissolve, it should just be a thick syrup. Drizzle over the rhubarb and toss to combine.

  3. Split 1 vanilla bean lengthwise and scrape in seeds from the vanilla bean over the rhubarb mixture. Toss to combine and add the vanilla bean pods. Roast until rhubarb is very tender and the juices are syrupy, around 30 - 40 minutes. Let cool slightly on a wire rack before transferring to the panna cotta tart. Serve immediately.



  1. this tart is absolutely gorgeous!!!

    and i feel your pain about the kitchen redo. you'll probably get a ton of people telling you this, but as someone who is about to be finished with a kitchen redo, it is SO worth it. ours was totally ikea and d.i.y. but i was pleasantly surprised at how much we really could do by ourselves (well, how much my man and his dad could do by their selves HAH). it took... ohhh, maybe seven times longer than we originally predicted, but it was worth it :)

  2. I have similar squick-issues about gelatin but I know it's something that I need to get over. I absolutely love the idea of this tart. Anything with rhubarb is a winner but combined with that creamy filling? I'm totally sold.

    Also, when we did our kitchen last year our kitchen contractor recommended ikea cupboards all the way. He says that they're by far and away the best for the money and you can use them in conjunction with a slightly more expensive worktop to get a really fancy looking kitchen on a limited budget. Of course, we then bought a ridiculously expensive fridge thereby cancelling out any savings...

  3. I just discovered your wonderful blog - fellow Oregonian here, just south of Corvallis. There are some vegetarian and vegan alternatives which work as well as conventional gelatin, if you're interested, Google brings those up on a search for "plant-based" gelatin quite nicely. I plan to use a vegan thickener when I make your recipe this weekend, rhubarb being top of my favorite flavors list. If you are curious about the historical process(es) used to create gelatin in the past, Chris Kimball of America's Test Kitchen and Cook's Country described it in rather unpleasant detail in his book "Fannie's Last Supper" and in the PBS documentary of the same name, which recreated Fannie Farmer's Christmas dinner from over a century ago in Boston - right down to the creation of gelatin from scratch and the installation of a woodburning stove in a Boston brownstone! I'm enjoying reading recipes and blog posts here, thank you for having such a lovely blog!

  4. i hope the kitchen situation will be figured out soon...and you are welcome to use my kitchen in the meanwhile..that only means more baked goodies for me. this tart looks phenomenal.

  5. So stunningly beautiful! I love the rich color in this tart.

  6. What a tart! Perfect. And good luck (and nerves!) with your kitchen!

  7. Hey, this recipe got a shoutout from the cooking channel blog:

  8. Divine! What a great way to use up rhubarb!

  9. I made this the other day for an indoor picknick and it was fantastic, thank you so much!



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