01 - Combine milk and dried lavender in a small saucepan. Heat gently over low heat until just steaming, approximately 2 minutes. Do not allow to boil. Remove from heat source immediately.
02 - Let lavender steep in hot milk for 5 minutes to extract floral essence. Pour mixture through fine-mesh strainer into a heat-proof container, discarding lavender buds. Allow infused milk to cool until lukewarm.
03 - Place powdered sugar in mixing bowl. Gradually whisk in 2.5 to 3 tablespoons lavender-infused milk. Add lemon juice if desired for brightness. Whisk vigorously until completely smooth and free of lumps.
04 - Test glaze thickness. If too thick for pouring, add remaining infused milk 1 teaspoon at a time. If too thin, incorporate additional powdered sugar 1 tablespoon at a time. Aim for ribbon-like consistency that slowly drizzles from whisk.
05 - Pour or spread glaze over completely cooled baked goods. Use spoon or piping bag for controlled application. Allow glaze to set at room temperature for minimum 10 minutes before serving or storing.