Preheat your oven to 400°F and line a baking sheet with parchment paper for easy cleanup.
In a small pot, gently warm the heavy cream with the chamomile tea bag to infuse it with flavor, then let it cool.
In a big bowl, whisk together the flour, sugar, baking powder, baking soda, and salt.
Cut in the cold butter until the mix looks like small crumbs. This is what makes the scones flaky.
Mix in the beaten egg, vanilla, and cooled cream just until the dough starts to come together.
Gently add the blueberries to the dough, being careful not to crush them.
On a floured surface, form the dough into a circle and cut it into 8 wedges.
Place the wedges on the baking sheet, brush with cream, sprinkle with sugar, and bake until golden.
Let the scones cool a bit before enjoying them with your favorite tea or coffee.