A home holiday gathering or milestone birthday party for 15 to 30 people sits in an awkward middle ground: too big to casually wing dinner, too small and too personal to feel like it needs an event planner. Hosts in that spot usually land on one of three paths — ask everyone to bring a dish, order ready-to-serve trays for drop-off, or hire a caterer to run the whole thing. Each one changes what your afternoon actually looks like, not just what it costs.
What Each Option Actually Involves
A potluck puts the menu in your guests’ hands. You typically provide the venue and maybe one main dish, drinks, plates, and utensils; everyone else brings something to share. It spreads the cost across the group and tends to produce a genuinely wide spread of food, but you have no control over what shows up — you can end up with four desserts and no vegetable, and dietary needs can get overlooked unless you coordinate ahead of time.
Drop-off catering means a caterer prepares the food off-site, delivers it, and sets it out in ready-to-serve trays or platters — then leaves. You get professionally made food without cooking it yourself, at a lower price than full service because there’s no staff for serving or cleanup. The trade-off is that you and your guests are on the hook for plating, refilling trays, and cleanup, and because the food travels before it’s served, it won’t arrive as hot as something cooked on-site.
Full-service catering covers the menu, the cooking, the serving, and usually the cleanup, sometimes with on-site staff keeping dishes warm in chafing trays and handling drink refills. It’s the most hands-off option for a host and the easiest way to accommodate a guest with a dietary restriction without a special trip to the store — but it’s also the most expensive of the three, and you give up some control over exactly how things are presented once the crew takes over.
Cost, Effort, and Control at a Glance
| Format | Relative cost | Host effort on party day | Menu control | Best fit |
|---|---|---|---|---|
| Potluck | Lowest — cost is spread across guests | Low cooking, but coordination beforehand | Lowest — menu is whatever shows up | Close friends/family, casual tone, tight budget |
| Drop-off trays | Moderate | Moderate — you plate, refill, and clean up | High — you choose everything ordered | Hosts who want restaurant-quality food without full staffing cost |
| Full-service | Highest | Lowest — staff handles serving and cleanup | High, with less control over final presentation | Milestone birthdays, larger or more formal holiday gatherings |
How Much Food to Order for the Group
Whichever format you choose, the quantity math is the same. Caterers and party planners commonly advise planning for about one pound of food per adult, excluding dessert, with children typically eating about half that amount. From there, the guidance breaks down by course:
- Appetizers: 3–4 pieces per person when a main course follows; 4–6 pieces for a more casual, grazing-style event; 4–6 pieces per person per hour (or 8–12 total) if appetizers are the whole meal.
- Protein: 6–8 ounces per person as a served portion. If turkey is the centerpiece, plan on 1 to 1.5 pounds of raw weight per person.
- Starches and vegetables: roughly 1.5 ounces of grains, 5–6 ounces of potatoes, and 4 ounces of vegetables per person, plus about an ounce of salad (or a half to full cup) before dressing.
- Bread and extras: 1–2 rolls or pieces of bread per person, and about a half cup of gravy if it’s on the menu.
- Dessert: one slice of cake, tart, or pastry per guest, with individual portions trimmed slightly if you’re offering more than one dessert option.
Two adjustments matter for a home party specifically. A buffet-style spread — the default for most drop-off and potluck setups — tends to run 10–15% higher in total food volume than a plated meal, because guests naturally take a bit more when they’re serving themselves. And an evening gathering will out-eat a daytime one, so shift your order upward if the party runs past dinnertime.
Matching the Format to the Gathering
A potluck works best when the group already knows each other well enough to coordinate informally — a text thread confirming who’s bringing what avoids the classic four-dessert problem, and it’s the natural choice when the budget needs to stretch furthest. Drop-off catering is the middle path for a host who wants a specific, dependable menu — including something built around dietary restrictions — without paying for on-site staff; it works well for a party where the host is comfortable setting out trays and doesn’t mind handling cleanup afterward. Full-service catering earns its higher price at a milestone birthday, a larger holiday open house, or any gathering where the host genuinely wants to be a guest at their own party instead of running the kitchen.
None of these choices is universally “correct” — the right one for a 20-person holiday gathering depends on how much hands-on time the host wants to spend once the doorbell starts ringing, and how much of that time is worth paying someone else for.