These mashed potatoes are extra rich thanks to cream cheese and caramelized onions, which add toasty sweetness. The onions are flavour-intense, so instead of stirring them in, you may want to serve them on the side. Love caramelized onions? Double the onion recipe.
Prepare onions. Cover and refrigerate up to 3 days. Reheat, covered, in microwave, stirring occasionally, until warm. Add a little water, if needed.