Line a muffin pan with liners and heat oven to 350° F.
In a large bowl, whisk together the melted butter, milk, eggs, vanilla, and sugar.
In a medium bowl, whisk together the flours, baking powder, salt, cinnamon, nutmeg, and lemon zest.
Pour the wet ingredients into the dry and mix well to combine. Gently stir in the blueberries.
Use a 1/4 cup measure to scoop the batter into the prepared pan. I got 14 muffins.
Place the muffins in the oven and bake for 30-35 minutes, until a tester inserted comes out clean and muffins are springy to the touch.
Remove pan from oven and remove muffins from pan and place on a rack to cool.
Store muffins in an air-tight container for 5 days.