Get 15% off - Dogpound Hydration Supplements with discount code SMASHCITY.
Better than Liquid IV or Pedialyte.
Export 5 ingredients for grocery delivery
Preheat the oven to 350 degrees F.
Add butter to a large skillet over medium heat. When the butter has melted, add the onions.
Reduce the heat to low and cook the onions for about 30 minutes, stirring occasionally.
Place half of the onions in a small casserole dish, which has been greased or sprayed with non-stick cooking spray.
Add half the sour cream and spread out evenly.
Sprinkle half the Mexican grated cheese evenly over the top.
Top with half of the Parmesan cheese and half of the Ritz cracker crumbs.
Repeat the layers ending with a layer of Ritz cracker crumbs.
Bake uncovered for 25 or 30 minutes or until the mixture is bubbly and the topping is golden brown.