Follow these steps carefully to ensure your veggie fries are perfectly cooked—crispy and golden on the outside, and tender on the inside. The secret is in the preparation of the vegetables and the high-heat baking environment.

1. Preheat and Prepare: Begin by preheating your oven to 425°F (220°C). This high heat is essential for roasting the vegetables quickly, creating a crisp exterior before they have a chance to get soft and steamy. Line two large, rimmed baking sheets with parchment paper. Using two sheets is critical; it prevents overcrowding, which is the number one cause of soggy fries. Parchment paper ensures the fries don’t stick and makes cleanup a breeze.
2. Wash and Cut the Vegetables: Thoroughly wash and dry all your vegetables. Patting them completely dry with a paper towel is a crucial step to remove excess moisture and promote crisping.
   • For the Sweet Potato and Carrots: You can choose to peel them or leave the skin on for extra fiber and a more rustic feel. Cut them into uniform sticks, about 1/4 to 1/3-inch thick and 3-4 inches long. Uniformity is key for even cooking.
   • For the Zucchini: Trim the ends and cut it into sticks of the same size. Because zucchini has a higher water content, some prefer to lay the cut sticks on a paper towel and sprinkle them with a little salt. Let them sit for 15-20 minutes to draw out excess water, then pat them completely dry. This extra step guarantees a crispier zucchini fry.
3. Season the Fries: In a large mixing bowl, combine the sliced sweet potato, carrots, and zucchini. Drizzle the 2 tablespoons of olive oil over the top and toss gently with your hands or a spatula until every single stick is lightly and evenly coated. This oil barrier is what helps conduct heat and creates that fried-like texture.
4. Add the Dry Seasonings: In a small separate bowl, whisk together the smoked paprika, garlic powder, onion powder, salt, pepper, and the optional cornstarch. Sprinkling this mixture evenly over the oiled vegetables ensures there are no clumps of seasoning. Toss everything again until the vegetables are uniformly coated with the spice blend. The cornstarch should create a very thin, dusty layer on each fry.
5. Arrange on Baking Sheets: Carefully arrange the seasoned veggie sticks in a single layer on the prepared baking sheets. Make sure there is space between each fry. If they are touching or overlapping, they will steam instead of roast, resulting in a soft, limp texture. It’s better to use two slightly empty pans than one overcrowded pan.
6. Bake to Crispy Perfection: Place the baking sheets in the preheated oven. Bake for 20-25 minutes, flipping the fries halfway through the cooking time. The flip at the 10 or 12-minute mark is vital for ensuring both sides get golden brown and crispy. The fries are done when they are tender on the inside and visibly golden and crisped at the edges. Keep a close eye on them during the last 5 minutes, as the natural sugars in the sweet potato and carrots can cause them to brown quickly.
7. Serve Immediately: For the best possible texture and flavor, serve the baked veggie fries immediately. They are at their crispiest right out of the oven. Serve with your favorite dipping sauces and enjoy a truly guilt-free treat.