If you’re looking for the perfect warm, cheesy appetizer to impress your guests, this Baked Cheesy Onion Dip is a must-try. It’s rich, creamy, and packed with sweet caramelized onions, melted cheese, and a crispy, buttery Ritz cracker topping. This dish is a guaranteed hit at any gathering—whether it’s a bridal shower, game night, or holiday party.
The combination of sweet onions, tangy sour cream, creamy mayonnaise, and gooey melted cheese creates an indulgent dip that pairs beautifully with crackers, bread, or fresh veggies. The golden, crispy topping adds the perfect contrast, making every bite absolutely irresistible.
Ingredients and Their Roles
For the Dip:
- 2-3 large sweet onions, sliced – The star of the dish! Sweet onions provide a mild, caramelized flavor that balances the richness of the cheese.
- 1 cup mayonnaise – Adds creaminess and a slight tang, ensuring a smooth and rich texture.
- 1/2 cup sour cream – Enhances the creaminess while providing a subtle tang that balances the richness.
- 1 1/2 cups shredded cheddar cheese – Gives the dip its bold, sharp cheesy flavor. Aged cheddar works best!
- 1/2 cup shredded mozzarella cheese – Adds a gooey, melty texture to the dip.
- 1/2 teaspoon garlic powder – Enhances the savory depth of flavor.
- 1/2 teaspoon onion powder – Boosts the natural sweetness of the onions.
- 1/4 teaspoon black pepper – Adds a touch of heat and balances the flavors.
For the Crispy Topping:
- 1/2 cup crushed Ritz crackers – Creates a crunchy, buttery topping that contrasts beautifully with the creamy dip.
- 2 tablespoons unsalted butter, melted – Helps the crackers crisp up and adds a rich buttery taste.
- Chopped parsley (optional, for garnish) – Adds a fresh pop of color and a hint of herbal brightness.
Step-by-Step Instructions
1. Preheat the Oven
Preheat your oven to 350°F (175°C). Lightly grease a 9x13-inch baking dish with butter or cooking spray to prevent sticking.
2. Prepare the Onions
Slice sweet onions into 1/4-inch rings and spread them evenly in the prepared baking dish. These onions will soften and become wonderfully sweet as they bake.
3. Make the Cheese Mixture
In a medium bowl, combine:
- Mayonnaise
- Sour cream
- Cheddar cheese
- Mozzarella cheese
- Garlic powder
- Onion powder
- Black pepper
Stir everything together until fully combined.
4. Assemble the Dish
Pour the cheese mixture evenly over the sliced onions, ensuring that every piece is coated.
5. Add the Crispy Topping
In a small bowl, mix crushed Ritz crackers with melted butter. Sprinkle the buttery crumbs evenly over the cheese mixture for a crispy, golden finish.
6. Bake to Perfection
Place the dish in the preheated oven and bake for 30-35 minutes, or until the onions are tender, the cheese is bubbling, and the top is golden brown.
7. Garnish and Serve
If desired, sprinkle chopped parsley over the top for a fresh finish. Serve the dip hot with crackers, toasted baguette slices, or fresh vegetables.
Why This Recipe is Loved
- Rich and cheesy – The blend of cheddar and mozzarella creates the ultimate gooey texture.
- Sweet and savory balance – The natural sweetness of onions pairs perfectly with the tangy, creamy base.
- Crunchy, buttery topping – The Ritz crackers add the perfect crisp contrast.
- Easy to make – Simple ingredients and a straightforward process make this a stress-free party favorite.
Pro Tips for the Best Baked Cheesy Onion Dip
- Use sweet onions like Vidalia or Walla Walla for the best flavor.
- Grate your own cheese instead of using pre-shredded cheese for a smoother, creamier melt.
- For extra richness, add 2 ounces of softened cream cheese to the cheese mixture.
- Want a little heat? Add a pinch of cayenne pepper or red pepper flakes.
- Make it ahead – Assemble the dish a day in advance and bake just before serving.
Serving Suggestions
- Serve with crackers, crostini, or tortilla chips for dipping.
- Use as a topping for baked potatoes or grilled chicken.
- Pair with a crisp white wine or light beer to balance the richness.
Final Thoughts
This Baked Cheesy Onion Dip is the ultimate party dish—creamy, cheesy, slightly sweet, and topped with a golden, crispy crust. Whether you’re hosting a bridal shower, a family gathering, or just craving something indulgent, this dip will be the highlight of the table.
Try it once, and you’ll be making it for every occasion! Let us know in the comments how it turned out for you. Enjoy!