Cheesy Onion Bake

Featured in Sides That Steal the Show.

This delightful cheesy bake blends cream cheese, mayo, grated cheese, and Vidalia onions for a heavenly hot dip. Naturally gluten-free and easy to make lighter with low-fat options. Bakes to a golden, bubbly finish, making it a party favorite.
A chef wearing a white hat and apron.
Updated on Mon, 24 Mar 2025 23:19:42 GMT
A casserole bubbling with cheese and herbs in a clear dish. Pin it
A casserole bubbling with cheese and herbs in a clear dish. | cookscoop.com

This mouth-watering hot onion dip mixes sweet Vidalia onions with cream cheese, mayo, and gooey melted cheese to create the ultimate party starter. It comes out of the oven golden and bubbling - so simple to throw together but totally addictive!

I brought this to our block party last week and it was gone within minutes! Even people who swear they don't like onions couldn't keep their hands off it.

Key Ingredients and Smart Shopping Tips

  • Cream Cheese - Grab the solid block type, not the soft spread kind
  • Sweet Vidalia Onion - The hero that adds sweetness without any harsh bite
  • Mayonnaise - Brings amazing creaminess; don't worry, the light version works great too
  • Cheese - We mix varieties for the best melt and taste
  • Cayenne Pepper - Skip it if you want, but it adds nice background warmth
  • Salt and Pepper - Pulls everything together into flavor harmony

The real wow factor happens during baking when the cheeses melt into the creamy base and those onions soften up, letting all their natural sweetness come out.

Step-by-Step Cooking Guide

Step 1: Set Everything Up
Start by heating your oven to 350°F and giving a 9-inch pie plate or similar dish a light coat of cooking spray. Using a wide, shallow dish helps create more of that delicious crusty top everyone fights over.
Step 2: Blend Your Mixture
Take your room-temperature cream cheese and mix it with mayo in a big bowl until smooth. Throw in your chopped Vidalia onion, most of your shredded cheese (save about ½ cup for the top), pepper, salt, and cayenne if you're using it. Mix everything until it's completely combined.
Step 3: Fill and Finish
Dump your mixture into the prepared dish and smooth it out. Scatter that reserved cheese all over the top to create an amazing golden crust.
Step 4: Bake It Right
Let it cook for 45-50 minutes until the top turns deep golden and the edges start bubbling. This longer cooking time isn't just for show - it totally transforms those onions and lets everything meld together beautifully.
Step 5: Cool Slightly
Let it rest for a few minutes after baking. This helps it set up just enough while staying perfectly dippable. Serve with tortilla chips, pita wedges, crackers, bread chunks, or veggie sticks so everyone finds something they love.
A bowl of food with a cheesy topping. Pin it
A bowl of food with a cheesy topping. | cookscoop.com

Tasty Food Chemistry at Work

What makes this dip so irresistible comes down to fat chemistry. The cream cheese works as a stabilizer, while mayo brings that silky smoothness everyone loves. When heated, the cheese proteins slowly change their structure, giving you that amazing stretchy pull with every scoop. Slow cooking lets all the flavors combine perfectly while keeping that dreamy texture just right.

Party Presentation Ideas

Put this bubbling dip front and center at your next gathering. Guests can't help but be drawn to its golden top and amazing smell. I like to surround it with both colorful veggies and classic crackers for a pretty spread. When I'm feeling fancy, I'll portion it into small individual dishes, but for casual hangouts, one big rustic bowl creates that fun, shared experience everyone enjoys.

A delicious cheese and chips dish is displayed on a table, accompanied by a plate of chips and a bowl of salsa. Pin it
A delicious cheese and chips dish is displayed on a table, accompanied by a plate of chips and a bowl of salsa. | cookscoop.com

Flavor Twists Around the Country

This basic recipe can take on local flavors from all over. Try adding green chiles and pepper jack cheese for a Southwestern kick. Up in New England, folks mix in crab or lobster meat. Southern cooks love throwing in crispy bacon bits and a splash of bourbon. Want a Mediterranean vibe? Mix in some artichoke hearts, sun-dried tomatoes, and crumbled feta for a completely different but equally tasty treat.

Special Diet Options

Everyone can enjoy this crowd-pleaser with a few smart swaps. If you can't handle lactose, try lactose-free cream cheese and aged cheeses that naturally contain less lactose. Plant-based eaters can use cashew cream cheese, vegan mayo, and dairy-free cheese alternatives that melt surprisingly well. Since the dip itself doesn't contain gluten, folks avoiding wheat just need the right dippers to join in the fun.

Important Reminders

  • Don't cut the baking time short - those full 45 minutes make all the difference
  • Cover with foil if the top gets too brown too fast
  • Always pick sweet onions to avoid that harsh aftertaste
  • Make sure your cream cheese sits out long enough to soften
  • Zap leftovers in the microwave for 1-2 minutes to bring them back to life

I found out the hard way that regular yellow onions make this dip way too strong. My first batch was way too pungent, but switching to Vidalias or other sweet varieties totally changed the game - even my onion-hating friends went back for seconds.

Pro Cooking Shortcuts

  • Shred your cheese by hand instead of buying pre-shredded for better melting
  • Toss in 1-2 crushed garlic cloves for depth of flavor
  • Scatter fresh chopped chives on top for a pretty finish
  • Mix it up a day ahead and keep in the fridge until baking time
  • Run it under the broiler for the last minute for an extra golden finish
A delicious cheesy casserole in a glass dish. Pin it
A delicious cheesy casserole in a glass dish. | cookscoop.com

This gooey Baked Double Cheese and Sweet Onion Dip has become my party signature dish. It hits that perfect sweet spot between comfort food and fancy appetizer with enough complexity to keep everyone coming back for more. Best of all, it's so easy to throw together that I can actually hang out with my guests instead of hiding in the kitchen.

Last-Minute Suggestions

  • Hollow out a bread loaf and bake the dip right inside for wow factor
  • Cut calories by using reduced-fat cream cheese and mayo
  • Mix up your cheese selections - some smoked gouda adds amazing flavor
  • Sprinkle cooked bacon pieces on top after baking
  • Always make more than you think you need - it vanishes fast!

Frequently Asked Questions

→ What type of cheese works best?
Choose something mild and melty like Monterey Jack, mild cheddar, or Blarney Castle.
→ Can I swap Vidalia onions for others?
Definitely, but Vidalias are naturally sweet. Other onions might need cooking to unlock their sweetness.
→ What’s a lighter version option?
Switch to low-fat cream cheese and lightweight mayo for a healthier touch.
→ What can I serve with this?
Pair it with fresh veggies, crunchy chips, crackers, bread, or even spread it on sandwiches.
→ Can it be prepped ahead?
Of course! Mix everything and store it in the fridge, then bake when you're ready to enjoy.

Cheesy Onion Bake

A rich and golden mix of sweet onions, cream cheese, mayo, and grated cheese, baked to perfection.

Prep Time
5 Minutes
Cook Time
50 Minutes
Total Time
55 Minutes
By: Adriana

Category: Side Dishes

Difficulty: Easy

Cuisine: American

Yield: 8 Servings (8 servings)

Dietary: Low-Carb, Vegetarian, Gluten-Free

Ingredients

→ Dip

01 8 oz softened cream cheese (light works too)
02 1 cup mayo (light is fine)
03 6-8 oz shredded cheese, split (like Blarney Castle)
04 1 medium or large Vidalia onion, diced (around 1 full cup)
05 1 teaspoon ground black pepper, or adjust to your liking
06 ½ teaspoon salt, or adjust as needed
07 ¼ teaspoon cayenne, optional based on your taste

Instructions

Step 01

Set oven to 350°F. Coat a 9-inch pie pan with cooking spray.

Step 02

In a big bowl, stir together everything except for ½ cup of cheese you'll set aside.

Step 03

Pour mixture into your sprayed pan. Smooth it out and sprinkle with the reserved cheese.

Step 04

Pop it in the oven for 45-50 minutes until the top is bubbly and perfectly golden.

Step 05

After cooling down a bit, serve with crackers, veggies, or chips.

Notes

  1. Naturally free of gluten (check brands to confirm)
  2. Light mayo and cream cheese can be used
  3. Tastes best when eaten warm

Tools You'll Need

  • 9-inch pie pan

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Includes dairy
  • Contains egg ingredients

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 390
  • Total Fat: 38 g
  • Total Carbohydrate: 6 g
  • Protein: 7 g