01 - Preheat oven to 350°F. Grease a 12-cup mini bundt pan or muffin tin thoroughly with cooking spray or butter.
02 - In a medium bowl, whisk together flour, baking powder, baking soda, and salt until well blended. Set aside.
03 - In a large bowl, beat softened butter and granulated sugar with an electric mixer on medium-high speed until light and fluffy, approximately 2-3 minutes.
04 - Add eggs one at a time, beating well after each addition. Mix in vanilla extract and lemon zest until fully incorporated.
05 - Alternately add the flour mixture and milk to the butter mixture, beginning and ending with flour. Stir in lemon juice until just combined. Take care not to overmix.
06 - Divide batter evenly among prepared cups, filling each about 3/4 full.
07 - Bake for 16-18 minutes, or until a toothpick inserted into the center comes out clean. Let cakes cool in the pan for 10 minutes before transferring to a wire rack to cool completely.
08 - Whisk powdered sugar with enough fresh lemon juice to achieve a thick but pourable consistency. Drizzle glaze over completely cooled cakes.