Preheat the oven to 400 degrees F. Grease a standard 12-muffin pan or line with paper liners.
In a large bowl, whisk together flours, baking powder, salt and nutmeg. In another bowl, whisk together butter or oil, milk or cream, sugar and butter or vegetable oil.*
Add the wet ingredients to the flour mixture and mix together with a few light strokes just until the dry ingredients are moistened. DO not over mix, the batter should not be smooth. Divide the batter among the muffin cups.
Bake until a toothpick inserted in 1 or 2 of the muffins comes out clean, about 17 minutes or longer. Let cool for 2 to 3 minutes before removing from the pan. If not serving hot, let cool on a rack.
Recipe by In Good Taste at https://ingoodtaste.kitchen/whole-wheat-blueberry-muffins/