Choose acorn squash to roast in halves or slices with the skin on; choose butternut when you want peeled cubes or smooth soup. Both are winter squash with a long fall and winter season, and either can stand in for the other in many cooked recipes.
| What to compare | Acorn squash | Butternut squash |
|---|---|---|
| Shape | Small, ridged and rounded like an acorn. | Long neck with a wider, rounded base. |
| Prep | Halve, remove the seeds and roast; the skin is edible when cooked. | Peel, separate the neck and base, remove seeds and cut into pieces. |
| Easy serving style | Roast halves, rings or wedges; the cavity holds a filling. | Roast cubes, mash the cooked flesh or blend it into soup. |
| Local season | Common from September through February in northern temperate regions. | Peak harvest and flavor often run September through February; cured squash can be sold year-round. |
Which winter squash is easier to prepare?
Acorn squash avoids the peeling step: scrub it, cut it in half, scoop out the seeds and cook it. Utah State University Extension notes that its skin is edible and describes baking it in halves or slices. A stable cutting board and a sharp knife matter because winter squash has a hard rind.
Butternut squash takes more knife work before cooking, but its long neck makes even cubes straightforward once peeled. The rounded base contains the seed pocket. Peeling and cutting it into similarly sized pieces helps it cook evenly in a sheet pan or soup pot.
Can you swap them in a recipe?
Often, yes. Most winter squash can be interchanged in cooked recipes, but shape changes the prep and presentation. Use acorn when you want a roasted half on the plate; use butternut when the recipe calls for peeled pieces or a smooth puree.
In Season's produce notes list acorn squash for autumn and winter and track butternut through its peak harvest. For other fall picks, see the Fall 2026 produce index. Read Utah State University Extension's winter squash guide for selection and preparation steps.
Nutrition per 100 g
| Nutrient | Green acorn squash | Waltham butternut squash |
|---|---|---|
| Calories | 40 kcal | 45 kcal |
| Total fat | 0.1 g | 0.1 g |
| Fiber | 1.5 g | 2.0 g |
| Total sugars | 0.9 g | 2.2 g |
Figures are reference values from In Season's shared produce data. Nutrition can vary by variety and growing conditions.
Shared catalog last synced 23 September 2026.