| 1 | In large mixing bowl cream butter with both sugars until very light in color. |
| 2 | Scrape sides of bowl with rubber spatula. |
| 3 | Add vanilla, eggs and buttermilk, beating constantly. |
| 4 | In another bowl stir together nutmeg, baking powder, baking soda, salt and flours. |
| 5 | Add to butter mixture. |
| 6 | Gently mix just until combined. |
| 7 | Gently fold in blueberries. |
| 8 | Fill paper-lined muffin cups to top with batter. |
| 9 | Sprinkle each muffin with about 2 teaspoons nutmeg sugar. |
| 10 | Bake on rack in upper 1/3 of 400°F oven until muffins are lightly browned, about 20 to 25 minutes. |
| 11 | Remove muffins from pan to cooling rack. |
| 12 | Serve warm or at room temperature. |
| 13 | Makes 16 muffins or 6 jumbo muffins. |