01 - Preheat oven to 350°F. Grease a 12-cup mini bundt pan or muffin tin with butter or cooking spray.
02 - In a medium bowl, whisk together flour, baking powder, baking soda, and salt until well blended.
03 - In a large bowl, beat softened butter and granulated sugar with electric mixer on medium-high speed 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 until incorporated.
05 - Alternately add flour mixture and milk to butter mixture, beginning and ending with flour ingredients. Fold in lemon juice until just combined; avoid overmixing.
06 - Distribute batter evenly among prepared cups, filling each approximately three-quarters full.
07 - Bake for 16-18 minutes or until wooden pick inserted in center comes out clean. Allow cakes to cool in pan for 10 minutes before transferring to wire rack to cool completely.
08 - Whisk powdered sugar with sufficient fresh lemon juice to achieve thick, pourable consistency. Drizzle glaze over completely cooled cakes.