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1
Preheat oven to 325F.
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2
Line standard muffin tins with paper liners.
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3
Whisk together flour, zest, baking powder, and salt.
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4
With an electric mixer on medium-high speed, cream butter and granulated sugar until pale and fluffy.
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5
Beat in cream cheese.
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6
Reduce speed to low.
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7
Add eggs, one at a time, beating until each is incorporated, scraping down sides of bowl as needed.
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8
Beat in lemon juice and vanilla.
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9
Add flour mixture in three batches, beating until just combined after each.
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10
Divide batter evenly among lined cups, filling each three-quarters full.
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11
Bake, rotating tins halfway through, until a cake tester inserted in centers comes out clean, about 28 minutes.
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12
Transfer tins to wire racks to cool completely before removing cupcakes.
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13
Cupcakes can be stored overnight at room temperature, or frozen up to 2 months, in airtight containers.
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14
To finish, dust cupcakes with confectioners sugar.
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15
Fill a pastry bag fitted with a coupler and a medium round tip (#8) with curd.
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16
Insert tip into top of each cupcake, and squeeze some curd below top to fill the inside, then lift the tip and squeeze more curd in a pool on top.
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17
Filled cupcakes can be kept at room temperature up to 1 hour (or refrigerated a few hours more) before serving.