Keto Roasted Parmesan Brussels Sprouts

The secret to exceptional roasted brussels sprouts is a screaming-hot oven and absolute stillness during the first roast. Arrange them flat-side down on the sheet and leave them alone for the full 20 minutes—no stirring, no peeking, no moving. The direct heat creates a dark, crispy, caramelized crust that's where all the flavor lives. A 325°F oven yields steamed brussels sprouts; a 425°F oven yields magic.

Parmesan is added late, in two batches, so it doesn't burn. The first addition, tossed with hot brussels sprouts and garlic, begins to melt and adhere. The second, added at the very end, stays crispy and adds textural contrast. Balsamic vinegar is the keto cook's secret weapon—a small amount of high-quality aged vinegar adds sweetness and depth without spiking carbs, balancing the earthy brussels sprout flavor.

Red pepper flakes are optional but recommended; they add interest without heat if you use a light hand. This dish is best served immediately while the parmesan is still crisp and the brussels sprouts are still hot. Leftovers can be reheated in a dry skillet for 3–4 minutes, though they won't regain the original crust. These are strikingly good alongside a keto main or eaten on their own as a vegetable-forward meal.