01 - Combine milk and lavender buds in a medium saucepan. Heat over medium heat until just simmering. Remove from heat, cover, and let steep for 15 minutes to extract floral flavors.
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 together in a separate bowl until the mixture becomes pale yellow and slightly thickened, approximately 2-3 minutes.
04 - Slowly pour the warm lavender milk into the egg yolk mixture while whisking constantly. This gradual process prevents the eggs from curdling and ensures a smooth custard.
05 - Return the mixture to the saucepan. Cook over low heat, stirring continuously 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 immediately. Stir in the heavy cream and vanilla extract until fully combined. 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 preferably overnight to develop flavors.
08 - Process the chilled mixture in an ice cream maker according to the manufacturer's instructions. Transfer to an airtight container and freeze until firm, approximately 2-4 hours.
09 - Scoop into serving bowls. Garnish with additional lavender buds or edible flowers if desired. Serve immediately for optimal texture.