5 from 1 votes

Baked Onion Dip

This post may contain affiliate links. Please read our read the Privacy Policy

Cheesy, hot, baked Vidalia Onion dip with chunks of real sweet onions and loads of cheese is a perfect party appetizer. Served up with French bread slices or toasted baguettes, I love making hot onion dip for my own get-togethers.

baked onion dip in a casserole dish

This not-so-ordinary dip has the perfect bold flavors of an onion balanced with melty cheese. With super simple and readily available ingredients, this dip is also cost effective to make and won’t break the bank, which is one of the parts I like the best.

One of my very favorite dips to serve and to eat, I really hope this is one of your most requested recipes after your next party.

Dip Ingredients

Unlike my other cold dip recipes that are mainly meant as a chip dip (like ranch dip or cucumber dip), this onion dip is served hot.

  • Sweet Onions: Vidalia, Sweet Yellow Onions, or Maui can all be used.
  • Cheese: Shredded Swiss and Gruyere. Typically you can find these cheese mixes pre-shredded in a bag and already combined.
  • Real mayonnaise
  • Seasonings: garlic powder, salt, black pepper
  • Chopped green onions
onion dip being combined and spread into casserole dish

How to make Baked Onion Dip

  1. Preparation: Begin by preheating your oven to 350°F (175°C). Then, take a nonstick baking pan and lightly grease it with cooking spray. Set this aside for later use.
  2. Mix Ingredients: In a large mixing bowl, combine the following ingredients: 2 cups of finely chopped sweet onions, 1 1/2 cups of the shredded Swiss and Gruyere cheese mix, 2 cups of real mayonnaise, 1 teaspoon of garlic powder, 1 teaspoon of salt, and 1/4 teaspoon of pepper. Stir these together until everything is well mixed.
  3. Transfer to Baking Pan: Once your onion mixture is ready, take it and spread it evenly into the prepared baking pan. Make sure the mixture is spread out evenly for consistent baking.
collage showing how easy it is to bake onion dip with real onions
  1. Bake: Place the pan in the preheated oven and bake the onion dip for 30 minutes. You’ll know it’s done when the cheese has completely melted and the onions have softened and sweetened slightly from the heat.
  2. Cool and Serve: After baking, remove the pan from the oven and let the dip stand for about 5 minutes to cool down a bit. This resting period allows the flavors to meld together even more.
  3. Garnish and Enjoy: Just before serving, sprinkle some chopped green onions on top of the dip for a fresh, colorful garnish. Serve the warm onion dip with toasted slices of French bread for dipping.

What dippers to serve with Onion Dip

  • Traditionally I like sliced baguettes that are are either served as their natural state (soft bread) or crisped up on the oven. You can find the already crispy baguette pieces that are more like hard crouton texture in containers near the bakery in most stores.
  • We have a whole list of best vegetables for dipping if you need suggestions.
  • Serve in a bread bowl. We do that for our Knorr spinach dip and walk you through how to make the perfect bread bowl with images if you need help.
hot melted onion dip with cheese on a slice of bread

More Hot Dip Recipes

While I do have some amazing cold dip recipes and love sharing them with y’all (and you love them too!), finding baked or hot dips are not as common. Here are a few that I personally suggest if you are looking for a great right-out-of-the-oven dip to eat or to share.

5 from 1 votes

Vidalia Onion Dip (Hot)


Prep Time 15 minutes
Cook Time 30 minutes
Total Time 50 minutes
Cheesy, baked Vidalia onion dip is a fantastic choice as an appetizer, perfect to serve with french bread pieces. If you love onions, you will love this dip!

Equipment

  • 1 baking dish our baking dish is 6" x 8.5" x 2" deep dish or a round 10 inch cast iron works well

Ingredients
 

  • 2 cups sweet Vidalia onion chopped
  • 1-1/2 cups Swiss & gruyere mixed cheese shredded
  • 2 cups real mayonnaise Hellmann's
  • 1 teaspoon garlic powder
  • 1 teaspoon salt
  • 1/4 teaspoon black pepper
  • green onions chopped, optional topping
  • French bread slices toasted – for serving

Instructions

  • Preparation: Begin by preheating your oven to 350°F (175°C). Then, take a nonstick baking pan and lightly grease it with cooking spray. Set this aside for later use.
  • Mix Ingredients: In a large mixing bowl, combine the following ingredients: 2 cups of finely chopped sweet onions, 1 1/2 cups of the shredded Swiss and Gruyere cheese mix, 2 cups of real mayonnaise, 1 teaspoon of garlic powder, 1 teaspoon of salt, and 1/4 teaspoon of pepper. Stir these together until everything is well mixed.
  • Transfer to Baking Pan: Once your onion mixture is ready, take it and spread it evenly into the prepared baking pan.
  • Bake: Place the pan in the preheated oven and bake the onion dip for 30 minutes. You'll know it's done when the cheese has completely melted and the onions have softened and sweetened slightly from the heat.
  • Cool and Serve: After baking, remove the pan from the oven and let the dip stand for about 5 minutes to cool down a bit.
  • Garnish and Enjoy: Just before serving, sprinkle some chopped green onions on top. Serve the warm onion dip with toasted slices of French bread for dipping.

Video

Notes

Dippers for Onion Dip:
  • Baguettes: Serve cut baguettes either soft or crisped up in the oven. Pre-crisped baguette pieces may be available at the store.
  • Vegetables: Ideal for dipping, consider sliced green onions, carrots, and celery.
Variations
    • Swiss Cheese: A white, bold cheese like Swiss is pretty good with the onion flavors, as seen in dishes like grilled cheese with caramelized onions or French onion soup.

Nutrition

Serving: 0.5cup | Calories: 515kcal | Carbohydrates: 11g | Protein: 14g | Fat: 55g | Saturated Fat: 15g | Polyunsaturated Fat: 38g | Cholesterol: 66mg | Sodium: 824mg | Fiber: 1g | Sugar: 3g

Nutritional Disclaimer: The nutritional data provided here is auto-calculated and intended for your convenience only. As it’s generated via automation, its accuracy may be compromised. For precise nutritional insight, please compute the values utilizing the actual ingredients in your recipe through your chosen nutrition calculator or application.

Sharing of this recipe is encouraged and appreciated. Copying of full recipe to any social media is prohibited.

Did You Make This Recipe?

Make sure to follow Salty Side Dish on Pinterest and rate the recipe here and make sure to leave a comment below!

5 from 1 votes

Leave A Comment

Have a question or want to provide feedback? Share your recipe reviews or questions here and I will do my best to help!

Recipe Rating




One Comment

  1. The first time I had this dip was at a holiday gathering and when I asked for the recipe I was told it was onions, swiss cheese, and mayonnaise. I couldn’t believe 3 ingredients could taste so addictively good! I’ve made it a few times with different seasonings thrown in. Sometimes I add a splash of white wine and some Worcestershire sauce or old bay seasoning. It’s great!

Where To Next?