01 - Preheat oven to 350°F. Grease a 12-cup mini bundt or muffin pan thoroughly, or line with paper liners if using a muffin pan.
02 - In a medium bowl, whisk together flour, baking powder, baking soda, and salt until well combined.
03 - In a large bowl, beat butter and sugar together until light and fluffy, about 2-3 minutes.
04 - Add eggs one at a time, beating well after each addition. Stir in lemon zest, lemon juice, and vanilla extract until incorporated.
05 - Add flour mixture in three additions, alternating with milk, beginning and ending with flour. Mix until just combined; do not overmix.
06 - Divide batter evenly among prepared cups, filling each about 2/3 full.
07 - Bake for 17-20 minutes, or until a toothpick inserted into center comes out clean. Cool in pan for 10 minutes, then transfer to wire rack to cool completely.
08 - Heat milk for glaze just to a simmer. Remove from heat, add lavender buds, and steep for 10 minutes. Strain out lavender buds.
09 - Whisk infused milk with powdered sugar and lemon juice until smooth and pourable.
10 - Drizzle glaze over cooled cakes. Garnish with extra lemon zest or edible lavender buds if desired.