1. In a saucepan over medium heat, bring milk and lavender to a simmer. Transfer to a small bowl and let steep 15 minutes, then cover and chill for about 45 minutes. Strain milk and set aside; discard lavender.
2. Preheat oven to 375°. In a food processor, whirl flour, sugar, baking powder, baking soda, and salt. Add butter and lemon zest and pulse to form a coarse meal. Add lavender-infused milk and pulse to form a shaggy dough. Turn dough onto a floured surface and knead 3 to 5 times.
3. Form dough into a 6-in. circle. Cut into 6 wedges. Arrange wedges 2 in. apart on a baking sheet and bake until golden, 20 to 25 minutes.
Note: Nutritional analysis is per serving.