Description
An easy, cheesy side dish made with sweet caramelized onions, Gruyere, sharp cheddar and Parmesan cheese.
Ingredients
Scale
- 1 1/2 pounds sweet onions, sliced 1/4 inch thick
- 1 1/2 Tbsp butter
- 1 1/2 tsp olive oil
- 1/2 tsp kosher salt
- 1/4 tsp black pepper
- 1/4 tsp garlic powder
- 1/4 tsp dried thyme (or 3/4 tsp fresh thyme)
- 1/4 tsp smoked paprika
- 1 1/2 tsp Worcestershire sauce
- 2 oz shredded Gruyere cheese
- 2 oz shredded sharp cheddar cheese
- 2 Tbsp grated Parmesan cheese
Instructions
- Heat the butter and olive oil in a large skillet over medium heat.
- Add the sliced onions and salt. Cook for 25–35 minutes, stirring occasionally, until the onions are very soft, golden brown, and most of the liquid has evaporated. Reduce the heat to medium-low if the onions start browning too quickly.
- Stir in the black pepper, garlic powder, thyme, smoked paprika, and Worcestershire sauce. Cook for another minute.
- Preheat oven to 375°F. Grease an 8×8-inch or 9×9-inch baking dish with nonstick cooking spray.
- Spread half of the cooked onions evenly into the baking dish. Sprinkle with half of the Gruyere and cheddar cheese.
- Spread the remaining onions over the cheese. Top with the remaining Gruyere and cheddar, followed by the Parmesan cheese.
- Bake uncovered for 15–20 minutes, until the cheese is melted, bubbly, and lightly golden brown.
- Remove from the oven and let stand for 5 minutes before serving.
