rhubarb pie1

Lisa Ludwinski, 29, is a baker and cook living in Ferndale, Michigan. She recently returned to the Great Lakes State after a six-year stint eating bagels, nannying, and mixing many pounds of cookie dough in Brooklyn, finishing with stints at Momofuku Milk Bar and Four and Twenty Blackbirds. Now she is the owner of Sister Pie, a from-scratch home bakery serving the Detroit area via the Facebook page, and aims to celebrate the seasons with pie and other sweets through unique interpretations and natural ingredients. For now, she’s able to bake pies from home for sale under Michigan’s Cottage Food Law, but her goal is to open a full-service breakfast/lunch/pie shop. Here she offers her take on one of my favorite pies. I like to make a lattice top, which allows all of the moisture to escape efficiently (and I’ve reduced the pie crust ratio to 12-8-4 ounces of flour-butter-water), but a loose crumble allows for the same reduction; it’s also a great all-purpose topping for any fruit dessert. Lisa thickens the cooked fruit with tapioca; cornstarch will also work. I wholeheartedly support her urging you to avoid using a strawberry-rhubarb mixture and feature the amazing rhubarb on its own.—MR

Rhubarb Walnut Crumble Pie

by Lisa Ludwinski

The first time I made strawberry-rhubarb pie, I went in blindly. It was four years ago, for an episode of my cooking show I produced in order to challenge myself to learn to cook, to bake, and, ultimately, to improvise. The fact that I had never tasted rhubarb or that I had only tried my hand at homemade pie crust maybe once or twice before simply came with the territory. The pie was a success, and as I shamelessly devoured piece after piece, I imagined future Mays and Junes, newly rhubarb-filled and happy.

Fast-forward to today, many crumbles, crisps, and cobblers later, and I adore that tart perennial more than ever. Now I sell pies for a living, so I’ve been dreaming up this particular rendition in eager anticipation for months. First things first: lose the strawberries! Rhubarb on its own has unmatched flavor and enough star quality to carry a pie to heavenly levels. Another important note, which you’ve undoubtedly heard before: take the time to make a crust from scratch—really! Your skills will improve each time you try, and your pie will turn pie-haters into pie-lovers and eventually pie-bakers. And what’s the worst that could happen? You piece together a crumbly mess of flour, butter, salt, and water and press it into a pie tin—it’s going to be delicious regardless of its appearance.

Enter Rhubarb Walnut Crumble pie: rhubarb is gently tamed with sugar, orange, and cinnamon and placed into a flaky, all-butter crust spiked with whole-wheat flour to highlight the nuttiness of the crumble topping, made from lightly toasted walnuts, browned butter, and oats. The intoxicating aroma of pie baking in your oven will make it hard to resist digging in immediately, but it’s worth the wait for it to cool. The filling will thicken as it cools, and while you wait you can whip up some cream to dollop on each slice. Do it by hand—you might as well learn two impressive skills today.

Rhubarb Walnut Crumble Pie

For the crust:

  • 1 cup unbleached all-purpose flour
  • 1/4 cup whole-wheat flour
  • 1/2 teaspoon sugar
  • 1/2 teaspoon salt
  • 1/2 cup unsalted butter, chilled and cut into chunks
  • 2 to 5 tablespoons ice water

For the walnut crumble:

  • 6 tablespoons unsalted butter
  • 1/2 cup rolled oats
  • 1/4 cup lightly toasted chopped walnuts
  • 1/4 cup light brown sugar
  • 1/4 cup all-purpose flour
  • 1/4 cup whole-wheat flour
  • 1/4 teaspoon cinnamon
  • 1/4 teaspoon salt

For the rhubarb filling:

  • 5 cups sliced rhubarb
  • 1 1/4 cups granulated sugar
  • 5 tablespoons instant tapioca
  • 1 teaspoon grated orange zest
  • 1/4 teaspoon cinnamon
  • pinch of salt
  • 2 tablespoons cream cheese, at room temperature
    1. To make the crust, combine the flours, sugar, and salt in a mixing bowl. Using a pastry blender or two forks, cut in the butter until it resembles coarse meal. It’s okay if the butter bits are different sizes, so long as none of them are larger than peas. At this point, add the ice water a tablespoon at a time and begin to gather the dough together. Turn the dough over itself a few times, but be careful not to overwork it. Pat the dough into a round disc and wrap in plastic to chill for a couple of hours (or at least 30 minutes).
    2. To make the crumble, melt the butter over medium heat in a small saucepan. It will start to bubble and foam. Soon you will see little brown specks at the bottom of the saucepan, and smell a wonderfully nutty fragrance of freshly browned butter. Take the saucepan off the heat and let it cool.
    3. Meanwhile, in a small bowl combine the oats, walnuts, brown sugar, flours, cinnamon, and salt. Once the butter has cooled somewhat but is still fluid, add it to the oat mixture and mix until incorporated. Set aside, or refrigerate for later.
    4. To make the pie: Flour your work surface and place the unwrapped pie dough in the center. Using your favorite rolling pin (I prefer a French tapered pin, like this), press along the edges of the round, broadening the circle. You can move the disc around with your hands as you do this, making sure to flour the surface again when needed. Begin to flatten the pie dough into a larger circle by rolling from the center out. Roll, then rotate the disc and roll again. Don’t forget to keep flouring the surface. You can flip the disc and repeat this process until you have a circle of even thickness, about 12 inches in diameter. Invert your pie tin or dish onto the circle, and use a pastry cutter or knife to trim the dough, leaving a 1-inch border around the tin. Remove the pie tin and fold the dough in half. Place the folded dough into the pie tin, unfold it, and gently press it in, making sure it’s centered and fitted properly. To create a crimped edge, roll up the dough overhang toward the center of the pie, creating a ring of dough. Use the thumb and index finger of one hand to make a “V” and use the index finger of your other hand to press into the “V,” making a crimp. Continue until the entire ring of dough is crimped.
    5. At this point, you can put the crust in the refrigerator while you make the rhubarb filling. Congratulations, by the way! The hardest part is over.
    6. Preheat your oven to 425°F/218°C with a rack on the lowest level.
    7. Mix the rhubarb, granulated sugar, instant tapioca, orange zest, cinnamon, and salt in a bowl until uniformly combined.
    8. Remove the rolled-out pie crust from the refrigerator and use an off-set spatula or spoon to spread an even layer of cream cheese on the bottom of the crust. Fill the shell with the rhubarb mixture, and top with the walnut crumble.
    9. Bake the pie on a sheet tray (lined with aluminum foil for easier clean-up if you wish) at 425°F/218°C for 15 minutes, then lower the temperature to 375°F/190˚C and bake until the juices are bubbling all over and the crumble is browned, another 40 to 50 minutes. Cool the pie for at least 2 hours before slicing.

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© 2013 Michael Ruhlman. Photo © 2013 Donna Turner Ruhlman. All rights reserved.

 

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13 Wonderful responses to “Rhubarb Walnut Crumble Pie”

  • Susan

    I’ve had two near failures in my life. The first was when I took my first drag on a cigarette and didn’t cough or choke. I continued to enjoy smoking for many years after until I mastered quitting. The second was the first time I made a strawberry rhubarb pie. I had never had any experience baking with rhubarb either so I didn’t know the moisture it rendered while cooking. The pie was soup in a crust. I fixed that by pouring the filling into a sauce pan, added more sugar and cooked it until it made jam. Whew! Those were close calls!

  • Michael Ruhlman

    I too have underthickened the rhubarb thinking it couldn’t need THIS much starch. It does!

  • Lisa

    I can’t find good fresh rhubarb here in Atlanta and have to resort to frozen stuff. It’s just not the same.. And rhubarb is about all I miss from years in Minnesota and Chicago (except for the food and museums.) sigh.

    • Jan

      I live in the Atlanta area and I occasionally find in-season rhubarb at Whole Foods and even Publix. It’s not as lovely as homegrown or as bountiful as it is in cooler climates, but it’s still a treasure when you can find it.

  • Judi

    Hi Lisa,
    I’m from Atlanta and I feel your pain. Luckily, I relocated to California where we have lots of rhubarb this time of year. But listen, my mom in NC gets rhubarb all during the springtime. Go out to the sticks, it will appear.

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