At a glance
You're making stunning pistachio cupcakes with a fresh lemon curd filling and marbled mascarpone frosting—all without the dryness that usually plagues homemade cupcakes. The trick is using the reverse mixing method, where butter coats the flour first to lock in moisture, plus you'll need to make the lemon curd ahead and chill it completely before assembly. Once baked and cooled, you'll hollow out the centers, fill them with that tangy curd, and pipe the silky frosting on top.
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Making the homemade lemon curd
In a saucepan, rub the sugar together with the zest using your fingers, then add the egg yolks, juice, and salt. Toss in the butter cubes and cook the mixture over low heat, whisking constantly, until it thickens like pudding. Strain the finished curd through a sieve and let it chill completely in the fridge.
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Preparing the dry base for the cupcakes
Preheat the oven to 177 °C. In a bowl, combine the flour, starch, both sugars, baking powder and baking soda, salt, and finely ground pistachios. It's best to make sure all the dry ingredients are thoroughly combined before you start adding the wet ones.
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The reverse method for extra-moist batter
Add the cubed butter and two tablespoons of milk to the dry mixture. Mix on low speed until the texture resembles damp sand. This method ensures the butter coats the flour, giving the batter an incredibly moist and tender crumb once baked.
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