INGREDIENTS
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FOR THE STREUSEL
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1/2 cup brown sugar, packed
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1 tablespoon sugar
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1/2 cup all-purpose flour
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1/2 teaspoon cinnamon
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1/4 teaspoon salt
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5 tablespoons cold unsalted butter, cut into chunks
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FOR THE CUPCAKES
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3 cups (381 grams) all-purpose flour
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2 cups (400 grams) sugar
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1 tablespoon baking powder
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2 teaspoons cinnamon
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1/2 teaspoon nutmeg
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1 teaspoon salt
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1 cup (2 sticks or 226 grams) unsalted butter, softened but still cool
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1 cup sour cream
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4 eggs, at room temperature
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1 tablespoon (15 ml) vanilla extract