How Much Sweet Potato Casserole Per Person? Chart and Pans
Sweet potato casserole is rich (butter, brown sugar, a pecan or marshmallow topping), so guests take smaller scoops than you'd expect. Here's how much to plan per guest, a chart for 4 to 40 guests with pounds of sweet potatoes and pans, and a make-ahead plan for Thursday, Nov 26, 2026.
The quick answer
Plan about 1/2 cup of sweet potato casserole per person, which is about 1/3 lb of raw sweet potatoes per guest. Most 9x13 recipes use 4 lb of sweet potatoes for 12 servings (for example The Toasty Kitchen and Live Well Bake Often), so one 9x13 pan feeds about 12. A 3 lb recipe in the same pan makes a thinner layer that serves about 8 to 10.
If sweet potato casserole is the only potato on the table, or your family treats it like dessert, plan closer to 1/2 lb raw per person.
A medium sweet potato weighs about 1/2 lb, so count about 2 medium sweet potatoes per pound.
Sweet potato casserole chart by guests
| Guests | Raw sweet potatoes | Medium sweet potatoes | Pans |
|---|---|---|---|
| 4 | 1 1/2 lb | about 3 | one 8x8 (half recipe) |
| 6 | 2 lb | about 4 | one 8x8 (half recipe) |
| 8 | 3 lb | about 6 | one 9x13 (thin layer) |
| 10 | 3 1/2 lb | about 7 | one 9x13 |
| 12 | 4 lb | about 8 | one 9x13 |
| 16 | 5 1/2 lb | about 11 | one 9x13 + one 8x8 |
| 20 | 7 lb | about 14 | two 9x13 |
| 24 | 8 lb | about 16 | two 9x13 |
| 30 | 10 lb | about 20 | two 9x13 + one 8x8 |
| 40 | 13 1/2 lb | about 27 | three 9x13 + one 8x8 |
Amounts are 1/3 lb per guest, rounded up to the next half pound. Sweet potatoes vary a lot in size, so buy by weight and grab one or two extra. Canned works too: Spend With Pennies swaps 3 drained 29 oz cans for its 3 lb of fresh sweet potatoes.
What goes in one 9x13 pan
Recipes vary, but a typical 12-serving pan (this one from Live Well Bake Often) uses:
- 4 lb sweet potatoes, peeled, cubed, boiled until tender and mashed
- 3/4 cup brown sugar, 1/2 cup milk, 1/4 cup butter
- 2 large eggs, 1 teaspoon vanilla, 1 teaspoon cinnamon, 1/4 teaspoon salt
- A topping: a pecan streusel (usually brown sugar, butter and chopped pecans, often with a little flour) or mini marshmallows
Most 9x13 recipes bake at 350°F to 375°F for about 25 to 45 minutes, until hot through. If yours has marshmallows, add them near the end, as your recipe says, so they toast instead of melting flat. USDA lists 165°F as the safe temperature for casseroles, so check the center with a food thermometer, especially when the dish goes in cold from the fridge.
Make it ahead
- Up to 2 days before: boil and mash the sweet potatoes, cool them quickly in a shallow container and refrigerate.
- The day before: mix the filling, spread it in the pan, cover and refrigerate. Make the streusel and keep it in a separate bag.
- On the day: add the topping, then bake until the center reaches 165°F. A cold pan needs more time than the recipe says.
Leftovers and food safety
- Two-hour rule: refrigerate leftovers within 2 hours of coming out of the oven (1 hour above 90°F). Hot food on a buffet should stay at 140°F or warmer.
- Storage: USDA says leftovers keep 3 to 4 days in the fridge or 3 to 4 months in the freezer. Marshmallow tops get sticky after freezing, so scrape them off and add fresh ones when you reheat.
- Reheat covered until it reaches 165°F.
Example: 12 guests, dinner at 5 PM
12 × 1/3 lb = 4 lb of sweet potatoes (about 8 medium), one 9x13 pan.
- Weekend before (Nov 21-22): buy the sweet potatoes with the other sturdy vegetables. They keep fine in a cool, dark spot (not the fridge) for the week.
- Tuesday, Nov 24: boil and mash, cool in a shallow container, refrigerate.
- Wednesday, Nov 25: mix the filling into the 9x13 pan, cover and refrigerate. Bag the pecan topping.
- Thursday, 4:10 PM: the turkey comes out to rest; set the oven to 350°F and take the pan out of the fridge.
- Thursday, 4:20 PM: add the topping and bake next to the green bean casserole. Check the center at 4:50; when it's 165°F, it's ready for 5 PM.
The Thanksgiving cooking timeline shows the oven plan for every dish.
FAQ
How many people does a 9x13 sweet potato casserole serve? About 12 with a 4 lb recipe, or 8 to 10 with a 3 lb recipe.
How much sweet potato casserole for 50 people? About 17 lb of sweet potatoes (1/3 lb each), or 4 to 5 9x13 pans.
Do I need sweet potato casserole and mashed potatoes? Not necessarily, but if you serve both, keep both at the per-person amounts above. Mashed potatoes usually go faster. See how much mashed potatoes per person.
Is it safe for guests with allergies? Most versions contain milk, butter and eggs, and the streusel often has pecans (a tree nut) and wheat flour. Label the dish so guests can choose.
Plan the rest of the sides
- How much green bean casserole per person, how much stuffing per person and how much gravy per person
- How much cranberry sauce per person, how many dinner rolls per person and how many pies for Thanksgiving
- How much turkey per person, the Thanksgiving grocery list 2026 and the Thanksgiving dinner budget
- Christmas? See the Christmas dinner timeline and the Christmas grocery list 2026.
Plan it on paper: the Thanksgiving Planner 2026 has the menu, shopping list and a cooking schedule.
Set the table: the Thanksgiving Food Labels printable ($3) has fold-over dish cards with diet and allergy tick boxes. Labels help guests choose, but they don't guarantee a dish is allergen-free. Hosting friends? The Friendsgiving Place Cards & Table Set ($3) adds name cards, potluck labels and a menu card.
Sources: The Toasty Kitchen, Live Well Bake Often and Spend With Pennies sweet potato casserole recipes; USDA FSIS "Leftovers and Food Safety" and safe minimum internal temperature chart.
Related template: read about the thanksgiving planner 2026 template
See all Cedar & Ledger templates
Frequently asked questions
What does this guide cover?
How much sweet potato casserole per person: about 1/3 lb raw sweet potatoes, one 9x13 serves about 12, a chart for 4 to 40 guests and a make-ahead plan.
What's the main idea?
Plan about 1/2 cup of sweet potato casserole per person, which is about 1/3 lb of raw sweet potatoes per guest. Most 9x13 recipes use 4 lb of sweet potatoes for 12 servings (for example The Toasty Kitchen and Live Well Bake Often), so one 9x13 pan feeds about 12.
Do I need a template to do this?
No. A notebook or a sheet you build yourself works fine. Cedar & Ledger also sells spreadsheet templates (I'd earn from a purchase); see the template box at the top of this page.
Is this financial advice?
No. It's general information with example numbers only, not financial, tax, legal or medical advice. Use your own numbers and check anything important with a qualified professional or the official source.