01 -
Line a 12-cup muffin tin with paper liners. Warm up your oven to 350°F (180°C). This is also a good time to make sure your refrigerated ingredients are sitting out to reach room temperature.
02 -
In a small bowl, use your fingertips to rub the lemon zest into the granulated sugar until it resembles wet sand. This releases the essential oils from the zest and creates amazing lemon flavor throughout your cupcakes.
03 -
In your stand mixer bowl, whisk together the cake flour, lemon-infused sugar, chopped pistachios, baking powder, and salt until well combined. Add the softened butter cubes and mix on low speed for about 3 minutes until the mixture looks like coarse sand.
04 -
In a separate bowl, whisk together the room temperature sour cream, milk, vegetable oil, egg, vanilla extract, and fresh lemon juice until smooth and well combined.
05 -
Pour the wet ingredients into the flour-butter mixture and mix on low speed for just a few seconds. Stop and scrape down the sides of the bowl, then continue mixing until just combined - be careful not to overmix! The batter should be smooth but still have some texture.
06 -
Divide the batter evenly among the 12 cupcake liners, filling each about 3/4 full. Bake in your preheated oven for 15-20 minutes, or until a toothpick inserted into the center comes out with just a few moist crumbs. Let them cool in the pan for 5 minutes before transferring to a wire rack to cool completely.
07 -
While the cupcakes are cooling, combine the raspberries, sugar, and lemon juice in a medium saucepan over medium heat. Cook for about 10-12 minutes, occasionally mashing the berries with a spoon, until the mixture is bubbling and bright red. In a small bowl, whisk together the cornstarch and water, then stir this into your raspberry mixture. Continue cooking for 1-2 minutes until nicely thickened. Remove from heat and let cool.
08 -
In a large mixing bowl, beat the room temperature butter until smooth and creamy. Gradually add the powdered sugar and mix until fully incorporated. Pour in the heavy cream, fresh lemon juice, and lemon zest, then increase the speed and beat for another 2-3 minutes until your frosting is light, fluffy, and silky smooth.
09 -
Once the cupcakes are completely cool, use a small knife or cupcake corer to remove the centers (about 1 inch deep). Fill each cavity with the raspberry jam. Pipe a ring of lemon buttercream around the raspberry filling, then add a small spoonful of additional raspberry jam in the center. Sprinkle with chopped pistachios and top with a fresh raspberry for a gorgeous finishing touch.