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Creamy Hot Baked Onion Dip Recipe for Game Day Snacks

Hot Baked Onion Dip is an incredibly simple, flavorful appetizer made with just three ingredients: chopped sweet onions, real mayonnaise, and shredded Swiss cheese. It’s perfect for holidays, game day, or any gathering where you want a crowd-pleasing dip.

Hot onion dip in baking dish.

This baked onion dip is one of the quickest and most satisfying party recipes you’ll make. The flavor is mild and creamy, so even people who usually avoid raw onions often love it once it’s baked into this rich dip.

The recipe is famously easy to remember—some call it the “2+2+2 Dip” because each ingredient uses the same measurement, which makes scaling the recipe straightforward.

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

2+2+2 Dip—simple, fast, and reliably delicious.

Hot onion dip on a cracker.

How to make Hot Baked Onion Dip

  1. Preheat the oven to 400°F and lightly grease an 8″ x 8″ baking dish.
  2. In a bowl, combine 2 cups chopped sweet onion, 2 cups real mayonnaise, and 2 cups shredded Swiss cheese. Mix until evenly combined.
  3. Transfer the mixture to the prepared baking dish and bake for 25–30 minutes, or until the cheese is bubbling and lightly browned on top.
  4. Remove from the oven and gently blot the surface with a paper towel to absorb any excess oil. Serve warm with crackers or toasted French bread slices.
Hot onion dip with a spoon in the dish.

You can assemble the dip ahead of time and keep it covered in the refrigerator for up to two days; bake when you’re ready to serve.

Suggested game-day appetizers

  • Crab Meat au Gratin
  • Garlic Tuscan Shrimp Dip
  • Buffalo Chicken Pinwheels
  • Pink Shrimp Dip
  • New Orleans BBQ Shrimp
  • Classic Deviled Eggs
hot onion dip on a cracker

Hot Baked Onion Dip

An easy three-ingredient baked dip that’s ideal for parties, holidays, and game day.
Prep Time: 5 mins
Cook Time: 25 mins
Total Time: 30 mins
Course: Appetizer
Cuisine: American
Servings: 6 cups
Calories: 158 kcal (per serving, approximate)

Ingredients

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

Instructions

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

Notes

  • This dip can be assembled and refrigerated, covered, for up to two days before baking.