Preheat the oven to 350 degrees F. Prepare a 9x13" baking dish by spraying with nonstick cooking spray.
Measure all dry ingredients and add to a large mixing bowl. Stir gently to combine.
Measure all wet ingredients and add to a medium mixing bowl. Whisk to combine.
Add the wet ingredients to the dry ingredients. Stir to combine, then transfer the mixture to the prepared baking dish. Bake at 350 degrees for 30-35 minutes, or until the top begins to brown.
Top with additional maple syrup, chopped pecans, or cranberries if desired. Serve immediately, or cool to room temperature and store up to five days in the refrigerator.