I love hazelnuts! They not only have a one-of-a-kind flavor, but they're also full of nutrients! Step 1: Spread hazelnuts out in a large baking pan or baking sheet. Step 2: Preheat the oven to 275 degrees F. Step 3: Roast for 15-20 minutes, making sure they don't over-cook. Step 4 (optional): use a paper towel