01 - Combine milk and lavender buds in a medium saucepan. Heat over medium heat until just simmering, then remove from heat. Cover and let steep for 15 minutes to extract floral flavor.
02 - Pour the milk through a fine mesh sieve to remove lavender buds, pressing gently to maximize flavor extraction. Return the infused milk to the saucepan.
03 - Whisk egg yolks and sugar in a separate bowl until the mixture becomes pale yellow and slightly thickened, about 2-3 minutes.
04 - Slowly drizzle the warm lavender milk into the egg yolk mixture while whisking continuously. This gradual process prevents the eggs from scrambling and ensures a smooth custard.
05 - Return the mixture to the saucepan. Cook over low heat, stirring constantly with a wooden spoon, until the custard thickens enough to coat the back of the spoon (approximately 170°F). Do not allow the mixture to boil.
06 - Remove from heat immediately. Stir in the heavy cream and vanilla extract until fully incorporated. Add food coloring if using.
07 - Pour the custard through a fine sieve into a clean bowl. Let cool to room temperature, then cover and refrigerate for at least 4 hours or overnight for optimal flavor development.
08 - Process the chilled custard in an ice cream maker according to manufacturer's instructions. Transfer to a lidded container and freeze until firm, approximately 2-4 hours.
09 - Scoop into bowls and garnish with additional lavender buds or edible flowers if desired. Best served slightly softened for ideal texture.