Occasions • Thanksgiving

Baked Acorn Squash

Name: Baked Acorn Squash
Prep time: 10 min
Cook time: 45 min
Total time: 55 min
Yield: 4 servings
Ingredients: 2 medium acorn squash (about 1 1/2 lb each); 2 Tbsp olive oil; 2 Tbsp unsalted butter, plus 1 tsp for the cavities; 8 oz cremini mushrooms, sliced; 1 small shallot, minced; 1 tsp chopped fresh thyme; 1/2 tsp kosher salt and 1/4 tsp black pepper; 2 Tbsp chopped parsley

Baked acorn squash halves roasted cut side down, then filled with a buttery mushroom sauce and finished until tender.

Updated: Nov 9, 2026

⏱ 55 mintotal

4servings

210 kcalper serving

Easylevel

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Why you'll like it

Ready in about 55 min.
Serves 4 — easy to halve or double.
Easy level — everyday equipment only.
Storage, freezing and reheating covered below.

Baked Acorn Squash halves roast cut side down first, so the cut surface steams against the hot pan and the flesh softens without drying out, then they are flipped and filled with a butter and mushroom sauce for the last stretch. Acorn squash has dense, mildly sweet orange flesh and a thin skin that softens enough to eat, so there is nothing to peel.

Helpful guides

Instructions

Step 1

Heat the oven to 400 degrees F and line a rimmed sheet pan with parchment. Halve each squash lengthwise with a heavy knife, cutting through the stem first, then scoop out the seeds and stringy fibers with a spoon. Cutting through the stem keeps the halves even.

Step 2

Trim a thin slice off the rounded outside of each half so it sits flat, then rub the cut sides with olive oil, salt, and pepper. Set the halves cut side down on the pan, because flat, oiled surfaces brown evenly instead of rocking and scorching on one edge.

Step 3

Bake cut side down for 25 to 30 minutes, until the flesh gives slightly when pressed and a knife meets some resistance at the thickest point. Facing the cut side down traps steam so the flesh softens before the filling goes in.

Step 4

While the squash bakes, melt 2 Tbsp butter in a skillet over medium-high heat and cook the mushrooms for 6 to 8 minutes until their liquid cooks off and they brown. Add the shallot and thyme, cook 2 minutes more, and season with salt and pepper.

Step 5

Flip the halves cut side up, spoon the mushroom filling into the cavities, and dot with the remaining teaspoon of butter. Bake 12 to 15 minutes more, until a knife slides into the flesh easily and the filling bubbles at the edges.

Step 6

Scatter the parsley over the tops and serve hot. Cool leftovers within 2 hours, refrigerate in a covered container for 3 to 4 days, and reheat at 350 degrees F until hot throughout.

Troubleshooting — fixes, not repeats

If the squash is too hard to halve, microwave it whole for 2 to 3 minutes, let it cool slightly, then cut. A warm squash sits steadier on the board than one that keeps slipping.
If the filling looks watery, the mushrooms were not browned long enough. Cook them until the pan is nearly dry before adding the shallot and thyme.
If the halves cook unevenly, choose squash of the same size and turn them once during the first bake. The neck end has thinner walls and softens sooner than the bulb end.
If the flesh dries out or the edges burn, the oven is running hot. Check at 20 minutes, drop to 375 degrees F if browning is fast, and keep the squash cut side down until it is nearly tender.

Make it your way

For a brown sugar and butter version, skip the mushroom filling: put 2 tsp brown sugar, 1 tsp butter, and a pinch of salt and cinnamon into each cavity after the first bake, then finish cut side up until the sugar melts into a glaze.
A maple version uses maple syrup in place of the brown sugar, and a savory one stirs 1/4 cup cooked crumbled sausage or 2 Tbsp grated Parmesan into the mushroom filling.

Storage & reheating

Cool leftovers within 2 hours, then refrigerate in a covered container and use within 3 to 4 days. Reheat only the portion you will eat until steaming hot throughout — poultry and reheated rice should reach 165°F (74°C).

Reheat halves cut side up at 350 degrees F for 15 to 20 minutes, or microwave single portions for about 2 minutes, though the oven keeps the filling from turning watery.

Freeze the baked flesh without the filling for up to 3 months.

FAQ

Can you eat the skin of acorn squash?
Yes. Once it is fully baked the thin skin softens enough to eat and it holds the halves together. If you prefer, scoop the flesh out with a spoon and leave the skin on the plate.

Do I need to peel or seed it first?
Seed it, but do not peel it. Scoop out the seeds and stringy fibers before baking, since the skin protects the flesh and keeps each half in shape in the pan.

How do I know when it is done?
A knife should slide into the thickest part of the flesh with no resistance, usually 40 to 45 minutes total at 400 degrees F. Press the outside too, because the flesh should give slightly under a finger.