Only a few simple ingredients & one bowl are needed for these Easy Apple Oatmeal Muffins! Ready in about 30 minutes for a deliciously wholesome treat the entire family will adore.
Generously spray a muffin pan with nonstick spray. If using muffin liners, spray them with nonstick spray. The oatmeal cups stick to the liners a bit regardless, so I recommend skipping them.
Whisk all of the ingredients together, except for the apples (optional nuts & coarse sugar), in 1 large bowl. Using a spoon or rubber spatula, fold in the apples and nuts (if using).
Batter will be a little liquidy. *If your batter appears extremely liquidy, add up to ¼ cup additional oats to even out your mixture. Spoon batter evenly into muffin cups, making sure both the oats/apples and liquid are in each.
Fill all the way to the top. If desired, sprinkle the tops with coarse sugar.
Bake for 25-30 minutes or until the edges are lightly browned & top appears set. If the tops appear to brown very quickly, tent a piece of aluminum foil on top.
Cool for 5 minutes before serving. Cover leftover oatmeal cups tightly & refrigerate for up to 1 week.