2 Using a sharp, sturdy chef's knife, carefully cut the acorn squash in half, from stem to tip. (A rubber mallet can help if you have one.) The squash can rock back and forth, so take care as you are cutting it.
Use a sturdy metal spoon to scrape out the seeds and stringy bits inside each squash half, until the inside is smooth.
Take a sharp paring knife and score the insides of the acorn squash halves in a cross-hatch pattern, about a half-inch deep cuts.
Place the squash halves cut side up in a roasting pan. Pour 1/4-inch of water over the bottom of the pan so that the squash doesn't burn or get dried out in the oven.
3 Rub a half teaspoon of butter into the insides of each half. Sprinkle with a little salt if you are using unsalted butter. Crumble a tablespoon of brown sugar into the center of each half and drizzle with a teaspoon of maple syrup.
4 Bake for about an hour to an hour 15 minutes, until the tops of the squash halves are nicely browned, and the squash flesh is very soft and cooked through. It's hard to overcook squash, it just gets better with more caramelization. But don't undercook it.
When done, remove them from the oven and let them cool for a bit before serving. Spoon any buttery sugar sauce that has not already been absorbed by the squash over the top.