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1
For the cupcakes: Preheat the oven to 350 degrees F and position a rack in the middle of the oven.
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2
Line one 12-cup standard muffin tin with cupcake liners and spray the top of the tin lightly with baking spray.
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3
Spread the pecans out on a baking sheet and bake until nicely toasted, 8 to 10 minutes.
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4
Allow to cool, and then pulse in a food processor until finely grounded.
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5
Whisk together with the flour, baking powder, baking soda and salt.
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6
Set aside.
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7
Combine the butter and granulated sugar in the bowl of a stand mixer fitted with a paddle attachment (or in a large bowl if using a hand-held electric mixer).
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8
Beat on medium-high speed until light and fluffy, about 5 minutes.
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9
Add the eggs one at a time, beating to incorporate after each addition.
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10
Scrape down the sides of the bowl as needed.
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11
Beat in the lemon zest.
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12
Adjust the speed to low and add the flour mixture and sour cream in alternating batches, beginning and ending with the flour.
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13
Divide the batter evenly in the tin, filling about two-thirds of the way full.
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14
Top each with 2 peach wedges.
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15
Bake until the edges are golden and a toothpick inserted in the center comes out clean, 22 to 24 minutes.
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16
Cool the cupcakes on a rack in the tin for 10 minutes, and then remove.
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17
Cool on the rack completely.
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18
Combine the peach preserves and lemon juice in a small microwave-safe bowl and heat for a few seconds just to warm through.
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19
Generously brush the tops of each cupcake with the preserves.
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20
For the pecan crumble: Combine the flour, pecans, brown sugar, butter and salt.
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21
Spread out on a rimmed baking sheet and bake until golden, about 15 minutes, rotating the pan about halfway through.
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22
Allow to cool completely, and then crumble.
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23
Store in an airtight container.
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24
For the cream topping: Combine the sour cream, heavy cream and confectioners' sugar in a medium bowl.
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25
Whip on medium-high speed until stiff peaks form, about 4 minutes.
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26
Top each cupcake with the cream topping and sprinkle with the pecan crumble.
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27
Serve immediately.
