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1
In a bowl, whisk together the flour, 1/4 cup of the sugar, 1/2 teaspoon of the cinnamon, and 1 teaspoon salt.
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2
In a large bowl, whisk together the egg yolks, butter, and vanilla. Whisk in one third of the flour mixture then one third of the beer to the egg yolk mixture, just to combine. Add the rest of the flour mixture and beer in two additions; whisk well to combine. Set the batter aside to rest for 30 minutes.
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3
While the batter is resting, peel, core, and slice the apple into ten 1/8-inch-thick rings. Spread out the rings on a large plate. Stir together 1 tablespoon of the sugar and 1/4 teaspoon of the cinnamon, and sprinkle the mixture over the apple slices. Let the slices sir for 20 minutes to soften and absorb the sugar.
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4
Whisk the egg whites to soft peaks, and gently but thoroughly fold them into the batter.
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5
In a wide, shallow bowl, whisk together the remaining 6 tablespoons sugar, remaining 1/2 teaspoon cinnamon, and a pinch of salt.
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6
Fill a high-sided skillet or wide pot with 2 inches of oil, and heat the oil to 375°F. In batches, dip the apple rings into the batter to coat both sides, and fry, turing once, until the fritters are golden and crisp, about 3 minutes. Drain on paper towels, immediately toss in the cinnamon-sugar mixture, and serve warm.
