Turns out you don't need any special equipment to make a perfect, light, fluffy souffle! America's Test Kitchen has devised a two-part method that results in a glorious dessert.
Skillet Lemon Souffle
5 large eggs, separated
1/4 teaspoon cream of tartar
2/3 cup granulated sugar (4 3/4 ounces)
1/8 teaspoon table salt
1/3 cup juice and 1 teaspoon grated zest from 2 to 3 lemons
2 tablespoons unbleached all-purpose flour
1 tablespoon unsalted butter
Confectioners' sugar, for dusting
Adjust oven rack to middle position and heat oven to 375 degrees. Using stand mixer, whip egg whites and cream of tartar together on medium-low speed until foamy, about 1 minute. Slowly add 1/3 cup sugar and salt, then increase speed to medium-high and continue to whip until stiff peaks form, 3 to 5 minutes. Gently transfer whites to clean bowl and set aside.
Using stand mixer (no need to wash mixing bowl), whip yolks and remaining 1/3 cup sugar together on medium-high speed until pale and thick, about 1 minute. Whip in lemon juice, zest, and flour until incorporated, about 30 seconds.
Whisk ¼ of whipped egg whites into yolk mixture until almost no white streaks remain. Gently fold in remaining egg whites until just incorporated.
Melt butter in 10-inch ovenproof skillet over medium-low heat. Swirl pan to coat evenly with melted butter, then gently scrape soufflé batter into skillet and cook until edges begin to set and bubble slightly, about 2 minutes.
Transfer skillet to oven and bake soufflé until puffed, center jiggles slightly when shaken, and surface is golden, 7 to 11 minutes. Using potholder (skillet handle will be hot), remove skillet from oven. Dust soufflé with confectioners' sugar and serve immediately.
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