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Sweet Potato Casserole

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Firing up the stove

Sweet Potato Casserole

Roasted sweet potatoes whipped with brown butter, bourbon and warm spice, under a pecan crumble and a cloud of homemade tonka bean marshmallow fluff, torched until toasty.

Notes

Roasting instead of boiling keeps the sweet potatoes from getting watery and concentrates their sugar. Make the base a day ahead; bake, then top with fluff and torch the day of. Tonka is potent, with notes of vanilla, almond and cherry; a quarter bean is plenty, and food-safety guidance is to keep the amount small. Make the fluff the day you serve; leftovers keep a day refrigerated.

RECIPE CARD

Sweet Potato Casserole

Yield: Serves 10–12  |  Time: 1 hr roasting, 30 min bake

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Ingredients

Sweet Potatoes

  • 4 lb sweet potatoes (about 5 large)
  • 6 tbsp butter, browned
  • ⅓ cup brown sugar
  • ½ cup heavy cream
  • 2 large eggs
  • 2 tbsp bourbon (optional)
  • 1 tsp vanilla
  • 1 tsp cinnamon
  • ¼ tsp nutmeg
  • 1 tsp kosher salt

Pecan Crumble

  • ½ cup flour
  • ½ cup brown sugar
  • 1 cup pecans, chopped
  • 4 tbsp cold butter, cubed
  • Pinch of salt

Tonka Bean Marshmallow Fluff

  • 3 large egg whites, room temperature
  • ¼ tsp cream of tartar
  • Pinch of salt
  • 1 cup sugar
  • ⅓ cup light corn syrup
  • ¼ cup water
  • ¼ tonka bean, finely grated on a microplane
  • ½ tsp vanilla

Instructions

Sweet Potatoes

  1. Roast the sweet potatoes on a sheet pan at 400°F until very soft, about 1 hour. Cool slightly, peel and mash.
  2. Brown the butter in a small pan until nutty.
  3. Beat the sweet potatoes with the brown butter, brown sugar, cream, eggs, bourbon, vanilla, spices and salt until smooth.
  4. Rub the crumble ingredients together until clumpy.
  5. Spread the sweet potatoes in a buttered 9x13 dish and scatter the crumble over the top.
  6. Bake at 350°F for 25–30 minutes, until set.

Tonka Bean Marshmallow Fluff

  1. Put the egg whites, cream of tartar and salt in a stand mixer with the whisk.
  2. Cook the sugar, corn syrup and water in a small saucepan over medium-high heat without stirring.
  3. When the syrup reaches 230°F, start whipping the whites to soft peaks.
  4. At 240°F, stream the hot syrup down the side of the bowl with the mixer on medium-high.
  5. Add the tonka and vanilla and whip on high 5–7 minutes, until thick, glossy and lukewarm.

Finish

  1. Spoon or pipe the fluff over the warm casserole in swoops and peaks.
  2. Toast the fluff with a kitchen torch, sweeping the flame over the peaks until golden and charred in spots. Serve warm.

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