Step 1: Peel and grate the potatoes using the large holes of a box grater or a food processor.
Step 2: Place the grated potatoes in a colander and rinse thoroughly under cold running water until the water runs clear. This removes excess starch.
Step 3: Transfer the rinsed potatoes to a clean kitchen towel or several layers of paper towels. Gather the towel's edges and twist tightly, squeezing out as much moisture as possible. This step is crucial for crispiness!
Step 4: Place the dried potatoes in a large bowl. Drizzle with 2 tablespoons of oil, salt, pepper, and optional onion/garlic powder. Toss until the potatoes are evenly coated.
Step 5: Preheat your waffle iron to medium-high heat. Lightly brush or spray the cooking plates with additional oil.
Step 6: Take a handful of the seasoned potatoes (about 1/4 of the mixture) and spread them evenly over the bottom plate of the hot waffle iron. Close the lid firmly.
Step 7: Cook for 8-15 minutes, or until the hash browns are deeply golden brown and wonderfully crispy. Cooking time will vary by waffle iron and desired crispness. Do not open the lid too early.
Step 8: Carefully remove the crispy hash browns with a fork or spatula. Repeat with the remaining potato mixture. Serve immediately and enjoy your Crispy Waffle Iron Hash Browns!