"More delicious than your average muffin, these beauties are made incredible by a bit of lemon zest and a healthy coating of brown sugar-oatmeal streusel for a crunchy finish...."
INGREDIENTS
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1 stick unsalted butter, softened, plus more for muffin tin
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1 cup sugar
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2 extra-large eggs
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2 teaspoons lemon zest
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2 teaspoons vanilla (see note)
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2 cups plus 1 tablespoon flour
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1 1/2 teaspoons baking powder
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1/4 teaspoon salt
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1/2 cup milk
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2 cups fresh blueberries, washed well
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3 tablespoons dark brown sugar (see note)
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1 tablespoon flour
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3 tablespoons dry oats (instant or regular)
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3 tablespoons unsalted butter at room temperature