Preheat oven to 350º. Prepare a muffin pan by spraying the cavities with cooking spray or lining them with parchment paper liners. Set aside.
* You can also use brown sugar.
** You can also use all-purpose flour, or use a mix of all-purpose and whole wheat. I'd probably use 3/4 cup (90 g) all-purpose and 1/2 cup (60 g) whole wheat. I've also had readers say that an all-purpose gluten-free mix works as well.