Simple Blueberry Muffins

Preheat oven to 425. Line 12 muffin tins with paper liners or spray with nonstick spray. In a large bowl, combine the flour, sugar and baking powder. In a small bowl, whisk together the buttermilk, oil and eggs. Pour the wet ingredients over the dry mixture and add the blueberries. Stir until combined. Fill each cup 3/4 full. Sprinkle the top of each with a little brown sugar. Bake 15-18 minutes, or until muffins are golden and springy to the touch.