White Castle Copycat Slider Casserole with Pickles
A layered casserole that captures the iconic White Castle slider experience in family-sized portions. Ground beef seasoned with onion soup mix gets creamy with mayonnaise, then layers between soft slider buns with melted cheddar and tangy dill pickles. Perfect for feeding a crowd who craves that nostalgic fast-food flavor without the drive-through wait. The casserole format makes it ideal for potlucks, game day gatherings, or when you want slider taste with fork-and-knife convenience.
Ingredients
Instructions
- 1
Preheat oven
- 2
Brown ground beef in skillet over medium heat and drain excess fat
- 3
Stir in dry onion soup mix and mayonnaise and cook for another 2 minutes
- 4
Layer bottom of baking dish with half of the slider buns
- 5
Spread beef mixture over buns and top with cheddar cheese and pickles
- 6
Place remaining slider buns on top
- 7
Bake until cheese is melted and bubbly
- 8
Let cool for a few minutes before serving
Tips
Drain ground beef thoroughly to prevent a greasy casserole that could make the bottom buns soggy.
Press down gently on top bun layer before baking to help layers stick together for cleaner slices.
Good to Know
Refrigerate covered for up to 3 days. Reheat portions in microwave or oven until warmed through.
Assemble completely up to 1 day ahead and refrigerate covered. Add 5-10 minutes to baking time if baking from cold.
Cut into squares and serve hot. Pairs well with potato chips or coleslaw for a complete comfort meal.
Common Mistakes
Don't skip draining the beef fat or the casserole will be greasy.
Avoid overbaking or the top buns will become too crispy and hard to cut.
Substitutions
FAQ
Can I freeze this casserole?
Yes, assemble without baking and freeze up to 3 months. Thaw overnight in refrigerator before baking, adding 10-15 extra minutes to cook time.
What if I can't find slider buns?
Regular hamburger buns work fine, just tear or cut them into smaller pieces to fit your baking dish better.
How long will leftovers keep?
Properly stored in the refrigerator, leftovers stay fresh for 3-4 days. Reheat individual portions in the microwave for best results.