Using Cornstarch for Crisper Roasted Vegetables

A light dusting of cornstarch can help some roasted vegetables develop a crisper surface. Drying, spacing, and adequate heat matter more than the starch alone.

A practical starting method

1. Preheat the oven to about 425°F. Use a rimmed sheet pan and cut the vegetables into similar-size pieces.
2. Dry the vegetables well, then toss with enough oil to coat lightly, salt, and suitable seasonings.
3. For vegetables such as potatoes or cauliflower, start with about 1 tablespoon cornstarch per pound. Toss thoroughly so no white clumps remain. Use less if the coating looks heavy.
4. Arrange in a single layer with space between pieces. Roast until tender and browned, turning as needed. The original 20–45-minute range is only a guide; vegetable size and moisture change the timing.

Where it helps—and where it does not

A crowded pan traps moisture and delays browning. Very watery vegetables may soften rather than turn crunchy, even with cornstarch. Avoid promising a French-fry texture from every vegetable.

Optional za’atar finish

For each pound of vegetables, try 1 teaspoon za’atar with the oil before roasting, then another ½–1 teaspoon after cooking. Watch the spices for scorching, and account for salt already in the blend.