The crispy exterior, however, is achieved by preheating the sheet pan itself in a 450° oven. You’re essentially treating the baking sheet like a sauté pan, searing an entire side of the brussels sprouts. Without preheating the pan, they’d overcook before they got to the ideal crispy state.

That’s pretty much it, honestly. You cut the sprouts in half, toss in olive oil, salt and pepper, and then arrange them cut-side-down on the hot-hot sheet. Use tongs! Move fast. Then they’ll roast for 20-25 minutes, until deeply browned.