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Baked Onion Dip

Some people like this cheesy dip so much that they can't tear themselves away from the appetizer table to eat their dinner. But can you blame them? With two kinds of cheese and sweet onions in the mix, this ultra creamy dip is unforgettable. —Mona Zignego, Hartford, Wisconsin
  • Total Time
    Prep: 5 min. Bake: 40 min.
  • Makes
    16 servings (2 cups)


  • 1 cup mayonnaise
  • 1 cup chopped sweet onion
  • 1 tablespoon grated Parmesan cheese
  • 1/4 teaspoon garlic salt
  • 1 cup shredded Swiss cheese
  • Minced fresh parsley, optional
  • Assorted crackers


  • In a large bowl, combine mayonnaise, onion, Parmesan cheese and garlic salt; stir in Swiss cheese. Spoon into a 1-qt. baking dish.
  • Bake, uncovered, at 325° until golden brown, about 40 minutes. If desired, sprinkle with parsley. Serve with crackers.
Nutrition Facts
2 tablespoon: 131 calories, 13g fat (3g saturated fat), 11mg cholesterol, 127mg sodium, 1g carbohydrate (1g sugars, 0 fiber), 2g protein.

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Average Rating:
  • KristineChayes
    Nov 10, 2020

    This Baked Onion Dip was a hit at a recent family dinner! It is simple to make and is a nice change from the standard onion mix and sour cream combo. A definite keeper!

  • Carollizc
    Jun 27, 2020

    I have made this many times and it's wonderful. I use lower fat mayonnaise and cheese, and it's still creamy, rich, and has wonderful sweet onion flavour.

  • delowenstein
    Dec 4, 2016

    I made this dip on 12/2/16! I took it to our Social Hour at my retirement community and everyone really enjoyed it-it was practically gone! I omitted the parsley and instead of Swiss cheese, I'd used "Double Cheddar" shredded Cheddar cheese: 1-1/2 cups and a whole sweet chopped Vidalia onion! I kept the mayo and Parmesan cheese the same! I sampled what was left and I admit that it WAS very tasty! delowenstein

  • wintermom9597
    May 27, 2013

    Easy to prepare, filled with great flavors. Was a hit at our family cookout.

  • bjpalmer
    Sep 23, 2011

    I made this YEARS ago when I was still a teenager for my family gatherings for holidays. Now I am requested to bring it to every gathering. The key to getting it to cook all the way through and brown nicely is to cook it in a nice shallow pan- maybe only 1-1 1/2 inch deep. Try it!

  • buffetfan
    Feb 12, 2011

    This is a keeper. I made this for an impromptu happy hour with friends and it was delicious. My husband even like it and he doesn't like manyonnaise or Parmensan cheese. I just didn't tell him what was in it! Will definitely make again. Served it with crackers and pita toast points.

  • cleim65
    Oct 25, 2010

    No comment left

  • recipelover88
    Dec 21, 2009

    No comment left

  • bigauntpat
    May 7, 2009

    No comment left

  • Acura
    Apr 4, 2009

    How this got 5 stars is beyond me...I did exactly as I was told except used 1 tbls of shredded parmesan cheese and it was one big casserole of fat...I drained it tasted ok...but never again this Baked Onion Dip!