01 - Preheat oven to 350°F. Generously 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. Set aside.
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. Mix in lemon juice until just combined. Avoid overmixing to prevent tough texture.
06 - Divide batter evenly among prepared cups, filling each about 3/4 full. Bake 16-18 minutes or until toothpick inserted in center comes out clean.
07 - Let cakes cool in pan for 10 minutes. Carefully turn out onto wire rack and cool completely before glazing.
08 - Whisk powdered sugar with 2-3 tbsp fresh lemon juice until smooth and thick but pourable. Drizzle generously over cooled cakes.