Prep: Preheat oven to 400°F (204°C). Drain chickpeas and pat as dry as possible with paper towels.
Mix: In a large bowl, stir together the chickpeas, ¼ cup tahini, and ½ tsp each salt, garlic powder, onion powder, smoked paprika.
Bake: Arrange chickpeas on a parchment-lined baking sheet in a single layer. Bake for about 30 minutes, flipping the chickpeas once during cooking, until golden brown and crispy (they'll continue to crisp up and dry as they cool).