01 - Combine milk and dried lavender in a small saucepan. Heat gently over low heat until just steaming, approximately 2 minutes. Remove from heat immediately, cover, and let lavender steep for 5 minutes to extract floral essence.
02 - Pour lavender mixture through a fine-mesh strainer into a clean container, pressing gently to extract all milk. Discard lavender buds and allow infused milk to cool until lukewarm.
03 - Place powdered sugar in a mixing bowl. Gradually whisk in 2.5 to 3 tablespoons of lavender-infused milk. Add lemon juice if using for brightness. Continue whisking until completely smooth and free of lumps.
04 - Check glaze texture. For a thinner consistency suitable for drizzling, add infused milk 1 teaspoon at a time. For thicker spreading consistency, incorporate additional powdered sugar 1 tablespoon at a time.
05 - Pour or spread glaze over completely cooled baked goods including cakes, scones, or cookies. Allow glaze to set at room temperature for at least 10 minutes before serving or storing.