01 - Preheat oven to 350°F. Generously grease a 12-cup mini muffin pan or mini cake molds with butter or cooking spray.
02 - In a medium bowl, whisk together flour, baking powder, and salt until thoroughly combined. Set aside.
03 - In a large bowl, beat softened butter and granulated sugar together using an electric mixer or whisk until pale and fluffy, approximately 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 half of the dry ingredients to the wet mixture, folding gently. Pour in milk, then add remaining flour mixture. Mix until just combined—take care not to overmix.
06 - Divide batter evenly among prepared mini cake molds, filling each approximately 2/3 full.
07 - Bake for 18-20 minutes, or until a toothpick inserted into the center emerges clean. Allow to cool in the pan for 5 minutes, then transfer to a wire rack to cool completely.
08 - While cakes cool, gently warm milk with dried lavender in a small saucepan over low heat for 2-3 minutes—do not let it boil. Remove from heat and let steep for 5 minutes. Strain to remove lavender buds.
09 - Whisk together powdered sugar, lavender-infused milk, and lemon juice in a bowl until smooth and pourable. Add additional milk, 1 teaspoon at a time, if needed to achieve desired consistency.
10 - Spoon or drizzle glaze over completely cooled mini lemon cakes. Garnish with additional lavender buds or lemon zest if desired. Allow glaze to set before serving.