In a food processor or a high-speed blender, place the chickpeas, tahini, olive oil, lemon juice, garlic powder, salt, and black pepper. Blend until very smooth, adding water as needed to blend, and/or to reach your desired consistency. You may need to stop and scrape down the sides a few times.
1 ½ cups cooked chickpeas, ⅓ cup runny tahini, 3 tablespoons olive oil, 2 tablespoons lemon juice, freshly squeezed, ½ teaspoon garlic powder, ¼ teaspoon salt, Freshly cracked black pepper, 3-4 tbps ice cold water