Creamy Hot Baked Onion Dip Recipe for Parties and Game Day

Hot Baked Onion Dip is an easy, crowd-pleasing appetizer made with just three simple ingredients: chopped sweet onions, real mayonnaise, and shredded Swiss cheese. It’s perfect for holidays, parties, and game-day gatherings.

This hot baked onion dip comes together in minutes and delivers rich, comforting flavor. Even guests who say they don’t like onions tend to reach for seconds.

My aunt first brought this dip to a family party years ago, and it was an immediate hit. Everyone asked for the recipe. She calls it the “2+2+2 Dip” because the quantities are easy to remember:

2 cups chopped sweet onion
2 cups real mayonnaise
2 cups shredded Swiss cheese

2+2+2 Dip — simple, tasty, and hard to mess up.

How to make Hot Baked Onion Dip:

Preheat the oven to 400°F (204°C) and lightly grease an 8″ x 8″ baking dish.
In a mixing bowl, combine 2 cups chopped sweet onion, 2 cups real mayonnaise, and 2 cups shredded Swiss cheese. Stir until evenly mixed.
Transfer the mixture to the prepared baking dish and bake for 25–30 minutes, or until the top is bubbly and lightly browned.
Remove from the oven and gently blot any excess oil from the surface with a paper towel. Serve warm with crackers or toasted bread slices.

You can prepare this dip ahead of time: mix the ingredients, cover, and refrigerate for up to 2 days. When you’re ready to serve, bake as directed.

Suggested party appetizers

Consider pairing this dip with other small bites or a charcuterie board to round out your spread.
Offer a variety of dippers—crackers, toasted baguette slices, vegetable sticks, or pretzels—for different textures.

Hot Baked Onion Dip

Amy Duska

A simple, three-ingredient baked dip that’s ideal for parties, holidays, and game day.

5 from 5 votes

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Prep Time 5 mins

Cook Time 25 mins

Total Time 30 mins

Course Appetizer

Cuisine American

Servings 6 cups

Calories 158 kcal

Ingredients

2 cups real mayonnaise
2 cups sweet onion chopped
2 cups Swiss cheese shredded

Instructions

Preheat oven to 400°F and lightly grease an 8″ x 8″ baking dish.
In a medium bowl, mix the chopped onion, mayonnaise, and shredded Swiss cheese until combined. Transfer to the prepared baking dish.
Bake for 25–30 minutes, until the cheese is bubbly and lightly browned. Remove from the oven and gently blot away any excess oil with a paper towel. Serve warm with crusty bread or crackers.

Notes

This dip can be mixed ahead of time and stored, covered, in the refrigerator for up to 2 days before baking.

Keyword last minute appetizer, onion dip