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1
Heat the oven to 250 degrees F and arrange a rack in the middle.
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2
Set a wire rack on a baking sheet and place it in the oven.
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3
Whisk together the flour, sugar, baking powder, cinnamon, baking soda, nutmeg, and salt in a large bowl to aerate and break up any lumps; set aside.
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4
Place the eggs in a large bowl and whisk until theyre just broken up.
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5
Add the buttermilk, applesauce, brown sugar, melted butter, and vanilla and whisk until evenly combined; set aside.
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6
Grate the apples on the large holes of a box grater and set aside.
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7
Add the buttermilk mixture to the flour mixture and stir with a rubber spatula until the flour is just incorporated and no streaks remain.
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8
(The batter may have a few lumps.)
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9
Using your hands, gently squeeze the excess moisture out of the grated apples.
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10
Fold them into the batter until just evenly combined.
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11
Heat the waffle iron to medium according to the manufacturers instructions.
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12
Once the iron is heated, brush it with vegetable oil, fill it with batter, close the lid, and cook until the waffle is golden brown (when the steam starts to diminish from the iron, you can open the top and peek for doneness).
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13
Transfer the waffle to the wire rack on the baking sheet in the oven to keep warm.
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14
Repeat with the remaining batter, brushing the iron with oil as needed.
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15
Serve with maple syrup.
