01 - Preheat oven to 350°F. Grease a 12-cup mini bundt pan or muffin tin with cooking spray or butter.
02 - Whisk together flour, baking powder, baking soda, and salt in a medium bowl until well blended.
03 - Beat butter and sugar in a large bowl until light and fluffy, approximately 2-3 minutes.
04 - Add eggs one at a time, beating thoroughly after each addition. Mix in vanilla extract and lemon zest.
05 - Alternately add flour mixture and milk to the butter mixture, beginning and ending with flour. Fold in lemon juice until just incorporated, being careful not to overmix.
06 - Distribute batter evenly among prepared cups, filling each about three-quarters full.
07 - Bake for 16-18 minutes, or until a toothpick inserted into the center comes out clean. Allow cakes to cool in the pan for 10 minutes before transferring to a wire rack to cool completely.
08 - Whisk powdered sugar with sufficient lemon juice to achieve a thick, pourable consistency. Drizzle glaze over completely cooled cakes.