Whole Wheat Clementine Muffins

1. Preheat oven to 400°F. Line a 12-count muffin tin with paper liners and set aside.
2. In a small bowl, mix clementines with sugar and mash with fork. Set aside.
3. Mix flours, baking powder, baking soda, salt and cinnamon with a whisk in a large bowl. Set aside.
4. In another bowl, combine buttermilk, oil, egg and vanilla with a whisk.
5. Pour liquids into the flour mixture and add clementines. Fold to combine.
6. Evenly distribute batter into muffin tins.
7. Bake for 14-15 minutes, or until a toothpick inserted into a muffin comes out clean.

Adapted from Martha Stewart.