Blueberry muffins

Blueberry muffins are delicious! I found a good recipe and thought, let me make this with whole wheat flour! It was good, better than I expected.  Here's the recipe I used: Savory Bites - Blueberry Muffins
I substituted half of the all purpose flour with whole wheat flour and added orange zest (from half an orange).  The cooking time is less than the above recipe called for, so after 8-9 minutes, I checked them every 1.5 - 2 minutes until the toothpick came out clean.
So - would I do it again? Yes...The muffins were definitely tasty but a bit more dense.  However, I will try it once using only all-purpose flour, just to see the difference :)

Yum!