01 - Combine milk and dried lavender in a small saucepan. Heat gently over low heat until just steaming, not boiling. Remove from heat and let steep for 5 minutes.
02 - Pour mixture through a fine-mesh strainer to remove lavender buds. Allow milk to cool slightly before using.
03 - Whisk powdered sugar with 2.5 to 3 tablespoons of lavender-infused milk in a mixing bowl. Add lemon juice if using. Continue whisking until completely smooth and pourable.
04 - If glaze is too thick, add more milk 1 teaspoon at a time. If too thin, add more powdered sugar 1 tablespoon at a time until desired consistency is reached.
05 - Drizzle or spread glaze evenly over cooled baked goods. Allow to set for at least 10 minutes before serving.