Make the honey lavender syrup – combine the honey, water, and dried culinary lavender in a small saucepan over medium-low heat. Stir occasionally until the honey is fully dissolved. Remove from heat and steep for 5 minutes. Strain through a fine mesh strainer into a clean airtight jar and let cool.
Steep the tea – place the Earl Grey tea bags in two mugs and pour boiling water evenly between them. Cover and steep for 4 to 5 minutes. Remove the tea bags and stir in the vanilla extract.
Warm and froth the milk – heat the milk in a small saucepan over medium heat until steaming at the edges but not boiling. Froth with a handheld frother or whisk until creamy and lightly foamy.
Add the syrup – stir 2 to 3 tablespoons of honey lavender syrup into each mug of steeped tea and adjust sweetness to taste.
Assemble and serve – pour the warm frothed milk into each mug, holding back the foam, then spoon the foam on top. Garnish with dried lavender and a drizzle of honey if using. Serve immediately.
Notes
Culinary lavender only – use culinary-grade dried lavender only. Decorative lavender is not food safe. Too much lavender produces a soapy flavor — stick to the measured amount. Do not over-steep the tea – steep Earl Grey for 4 to 5 minutes maximum. Over-steeping creates bitterness that carries through the frothed milk in the finished cup. Syrup storage – strain out all lavender buds before storing. Store in an airtight jar in the refrigerator for up to 1 week. Stir before each use. Iced version – steep the tea, stir in the syrup and vanilla, cool completely, pour over ice, and top with cold frothed milk. Garnish with dried lavender before serving.