01 - Preheat the oven to 350°F. Line a 12-cup muffin tin with cupcake liners.
02 - In a medium bowl, whisk together the flour, baking powder, baking soda, and salt until evenly distributed.
03 - In a large bowl, beat the softened butter and granulated sugar with an electric mixer until light and fluffy, approximately 2 to 3 minutes.
04 - Add the eggs one at a time, beating thoroughly after each addition. Stir in the lemon zest, lemon juice, and vanilla extract until fully incorporated.
05 - Alternately add the dry ingredient mixture and the milk to the wet ingredients, beginning and ending with the dry ingredients. Mix until just combined to avoid overmixing.
06 - Divide the batter evenly among the prepared cupcake liners, filling each approximately three-quarters full.
07 - Bake for 16 to 18 minutes, or until a toothpick inserted into the center of a cupcake comes out clean. Allow the cupcakes to cool in the tin for 5 minutes, then transfer to a wire rack to cool completely.
08 - Beat the softened butter until creamy. Gradually add the sifted powdered sugar on low speed. Mix in the strawberry purée, vanilla extract, and salt. Increase the mixer speed and beat until light and fluffy, scraping down the bowl as needed.
09 - Pipe or spread the strawberry frosting generously onto the fully cooled cupcakes. Garnish with halved fresh strawberries and a sprinkle of lemon zest.