01 - Combine milk and lavender buds in a medium saucepan. Heat over medium heat until just simmering, then remove from heat, cover, and steep for 15 minutes to extract floral flavor.
02 - Pour the milk through a fine mesh sieve to remove lavender buds, pressing gently to extract maximum flavor. Return the infused milk to the saucepan.
03 - Whisk egg yolks and sugar together in a separate bowl until the mixture becomes pale yellow and slightly thickened in consistency.
04 - Slowly pour the warm lavender milk into the egg yolk mixture while whisking continuously to prevent curdling and gently raise the temperature of the eggs.
05 - Return the mixture to the saucepan and cook over low heat, stirring constantly with a wooden spoon until the custard thickens and coats the back of the spoon (approximately 170°F). Do not allow the mixture to boil.
06 - Remove from heat and stir in the heavy cream and vanilla extract until fully incorporated. Add food coloring at this stage 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 until thoroughly chilled.
08 - Process the chilled mixture in an ice cream maker according to the manufacturer's instructions. Transfer to a lidded container and freeze until firm, approximately 2-4 hours.
09 - Scoop the lavender ice cream into serving dishes and garnish with additional lavender buds or edible flowers if desired.