If using homemade lavender syrup, prepare it ahead of time.
In a glass, add the lavender syrup, espresso, and ice.
Pour the milk over the ice.
Enjoy!
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Notes
A note about lavender: Starbucks makes their Iced Lavender Oatmilk Latte with lavender powder, which is nothing other than culinary-grade dried lavender flowers finely blended into a powder. You can do this instead of using lavender syrup and using the same amount (2 tablespoons). I have tried it this way and simply preferred the lavender syrup method and oddly enough, thought it tasted more like Starbucks! As for lavender syrup, I use my own recipe which you can as well, or you can also purchase lavender syrup for ease.