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1
Heat oven to 400F (200C) with oven rack in middle.
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2
Lightly spray 12 cups in a standard muffin pan with nonstick cooking spray.
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3
To Make the Streusel Topping:
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4
Combine flour, brown sugar, and cinnamon in a small bowl.
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5
Cut in butter with a pastry blender until mixture resembles coarse crumbs with some pea-sized pieces.
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6
To Make the Muffins:
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7
Combine flour, sugar, brown sugar, baking powder, cinnamon, and salt in a large bowl.
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8
Make a well in center of the flour by pushing ingredients out toward sides of bowl.
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9
Combine milk, melted butter, vanilla, and egg in a medium bowl.
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10
Pour milk mixture into the flour mixture, and stir only until the flour is moistened even though the batter is not smooth.
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11
Scrape down sides of bowl.
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12
Divide batter into prepared muffin cups, filling them about 2/3 full.
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13
Sprinkle about 1 tablespoon (15 mL) of streusel over each muffin.
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14
Bake 18 to 20 minutes or until golden brown and a toothpick inserted in the center of a couple of muffins comes out dry.
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15
Cool slightly and remove from the pan.
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16
Run a small metal spatula around edge of each muffin to loosen it, and lift gently from the pan.
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17
Serve muffins warm with butter or jam.