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1
Preheat oven to 350u00b0.
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2
To prepare cupcakes, combine 2 tablespoons boiling water and 4 teaspoons espresso, stirring until espresso dissolves. Stir in buttermilk.
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3
Lightly spoon flour into dry measuring cups; level with a knife. Combine flour, baking soda, and salt, stirring well with a whisk.
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4
Place 3/4 cup granulated sugar, butter, and 2 teaspoons vanilla extract in a large bowl; beat with a mixer at medium speed until well blended (about 5 minutes). Add eggs, 1 at a time, beating well after each addition. Add flour mixture and buttermilk mixture alternately to sugar mixture, beginning and ending with flour mixture.
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5
Spoon batter into 12 muffin cups lined with paper liners. Bake at 350u00b0 for 20 minutes or until a wooden pick inserted in center comes out clean. Cool cupcakes in pan 10 minutes on a wire rack; remove from pan.
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6
To prepare syrup, combine 1/4 cup granulated sugar, 1/4 cup water, 2 tablespoons espresso, corn syrup, and 1/4 teaspoon vanilla extract in a small saucepan; bring to a boil. Reduce heat; simmer 3 minutes. Pierce the cupcake tops several times with a wooden skewer. Brush espresso syrup evenly over the cupcakes. Cool completely on wire rack. Sprinkle with powdered sugar.
