Preheat your oven to 400 ℉. If using frozen berries, thaw them. Make sure you have some frozen butter to grate.
Mix your flour, baking powder, baking soda, and sugar in a mixing bowl.
Mix in the grated butter, pinching together to better mix.
In another bowl, mix together the milk, sour cream, vanilla, and lemon zest.
Add the wet ingredients to the dry and mix until it comes together, careful not to over-knead it.
Knead in the blueberries.
Shape the dough into a disc. Using your pastry cutter, cut the disc into however many pieces you want, radially, like a pie.
Bake for 15-20 minutes, until the top starts to brown.
Remove and place on a cooling rack to cool for 10 minutes before serving.