1-First Step: Preheat and Prep the Potatoes Begin by preheating your oven to 375°F (190°C) to ensure even baking. Wash and chop 1 lbs. russet potatoes into small pieces, leaving the skin on for extra nutrients and texture. This step sets the foundation, as the potatoes will soak up flavors while cooking quickly in just 5-10 minutes on the stove.

2-Second Step: Cook the Potatoes Heat a pan over medium heat and add 1 tsp. olive oil, the chopped potatoes, and 1/4 cup water. Season with salt and pepper, then stir often until the potatoes soften. For a healthier twist or if you’re adapting for dietary needs, you can use sweet potatoes here to boost vitamins. Once ready, transfer them to a baking dish about 5-10 minutes total.

3-Third Step: Brown the Beef Mixture In the same pan, add 1 lbs. lean ground beef and 1/2 white onion, chopped. Cook until the beef is mostly done and the onions soften, which takes around 5 minutes. Season with salt, pepper, 1/2 tsp. garlic powder, 1/2 tsp. onion powder, and 2 tsp. yellow mustard, mixing well to blend the flavors. If you’re substituting for a lighter version, ground turkey works great here and cooks a bit faster.

4-Fourth Step: Assemble and Bake Add the beef mixture to the baking dish with the potatoes, then top with 1 cup shredded cheddar cheese. Cover with foil and bake for 15 minutes until the cheese melts perfectly. This step is key for that gooey, comforting layer, and you can check at the 10-minute mark if your oven runs hot to avoid overcooking.

5-Fifth Step: Prepare the Sauce While the casserole bakes, make the sauce by combining 1/4 cup mayonnaise, 1/4 cup ketchup, 1/4 cup chopped dill pickles, and 1 tbsp. dill pickle juice. Mix it up and refrigerate until needed this adds the signature tang and can be adjusted for spice if you prefer a milder version.

6-Final Step: Add Toppings and Serve Remove the casserole from the oven, take off the foil, and top with the sauce, a handful of shredded iceberg lettuce, chopped white onions, 1 vine tomato chopped, and 1/4 cup dill pickle chips. Serve immediately for the best crunch and freshness adding lettuce at the end prevents it from getting soggy, which is ideal for busy families. This Big Mac Casserole serves 4-6 and pairs well with simple sides like a fresh salad from our blog, such as the one in our berry trifle recipe for a fruity twist.