
2 cups all-purpose flour
2 tablespoons fresh thyme leaves, divided; plus sprigs for garnish
1 tablespoon poppy seeds
1½ teaspoons baking powder
½ teaspoon baking soda
½ teaspoon coarse kosher salt
½ cup plus 2 tablespoons softened salted butter
1⅓ cups granulated sugar, divided
3 large eggs
¾ cup whole milk
1 tablespoon lemon zest
5 tablespoons fresh lemon juice, divided
1 vanilla bean, split and seeds scraped
1 tablespoon lemon zest