Made with whole wheat flour, blueberries, walnuts, tangy buttermilk, and orange zest, these delicious muffins are a healthy, grab-and-go breakfast for your busy mornings!
Preheat oven to 375°F. Grease 12 muffin cups with nonstick spray and coat with flour (or line with muffin liners).
Using a zester, zest the orange. Set aside.
In a large bowl, whisk the egg with the sugar. Stir in the buttermilk, vanilla, oil, and orange zest.
In a separate bowl, mix together the flour, flaxseed meal, baking soda, baking powder, and salt. Combine with the wet ingredients, mixing until just combined and still a bit lumpy. Fold in the walnuts and blueberries.
Divide batter among the prepared muffin cups. Bake for 21 minutes, until the tops are golden and a tester inserted into the center of the muffin comes out clean. Rest muffins in the pan on a cooling rack for 10 minutes, then carefully remove them from the tin to cool completely.