Preheat and Prep: First, preheat your oven to 200°C (180°C Fan) and line a large, rimmed baking sheet with baking parchment. Using a large enough tray is vital for getting them crispy.

Rinse the Chickpeas: Open the tins of chickpeas and pour them into a colander. Rinse them thoroughly under cold running water for about a minute, until the water runs clear and they no longer feel slick or slimy.

The Crucial Drying Step: This is the secret to success. Tip the rinsed chickpeas onto a clean tea towel or a double layer of paper towels. Place another towel on top and gently roll them around, patting them dry. We want to remove as much surface moisture as possible. They should look matte, not shiny. Let them air dry for a few minutes if you have time.

First Roast (The Drying Roast): Tip the dry chickpeas onto your prepared baking sheet. Drizzle with the 2 tablespoons of olive oil and use your hands or a spatula to toss them until they are evenly coated. Spread them into a single, even layer, ensuring they have plenty of space. Roast for 15 minutes.

Add the Seasoning: After 15 minutes, remove the tray from the oven. The chickpeas should be starting to feel firm. Sprinkle over the smoked paprika, garlic powder, onion powder, salt, and pepper. Use a spatula to toss everything together right on the hot tray until the chickpeas are evenly coated in the spice mixture.

Second Roast (The Crisping Roast): Return the tray to the oven and roast for another 15-20 minutes. I find that giving the tray a good shake halfway through this second roast helps them cook evenly.

Check for Doneness: They are ready when they are deeply golden brown, feel hard to the touch, and rattle when you shake the pan. If you try one (be careful, it's hot!), it should be crunchy all the way through. If they're still a bit soft in the middle, give them another 5 minutes.

Cool and Serve: Let the chickpeas cool on the baking sheet for at least 10 minutes. They will continue to crisp up as they cool down. Serve warm or at room temperature.