Preheat oven to 400 degrees. Generously grease a 12-cup muffin tin.
In a large bowl, combine the dry ingredients: oats, flours, salt, baking powder, baking soda, spices, and brown sugar.
In a small bowl or large measuring cup, combin the wet ingredients: orange juice, almond milk, eggs, orange zest, vanilla, and vegetable oil.
Add the wet ingredients to the dry, stirring until just incorporated, then stir in shredded carrots.
Divid the batter evenly among prepared muffin cups. Bake 20 minutes. Cool and store in an airtight container.