Save time by preparing components in advance. Form and freeze patties laid flat with parchment between layers; thaw overnight before cooking. Prepare sauces, pickles, and toppings like sliced onions and shredded lettuce the day before and keep them chilled.
For large groups, pre-toast buns and keep them in a warm oven, or set up a build-your-own station to let guests assemble. If you’ll grill, use a disposable aluminum pan to hold finished patties in a warm spot while you cook more.
Advance prep minimizes stress and keeps the host enjoying the party, not stuck at the grill.