Rachel says that she makes a bunch of these at once and then just keeps them refrigerated. #genius
Preheat oven to 375. Combine first 5 ingredients in a medium bowl, stirring with a whisk. Combine flour, baking powder, and salt in a large bowl, stirring with a whisk. Cut in butter with a pastry blender or 2 knives until mixture resembles coarse meal. Gently fold in blueberries and pecans. Add milk mixture, stirring just until moist (dough will be sticky).