Combine 2 tablespoons chickpea liquid and 1 cup chickpeas in a bowl for hummus. Reserve remaining chickpeas and liquid for another use.
Combine olive oil, peanut butter, lemon juice, sesame oil, cumin, onion powder, and salt in a blender. Blend until smooth, about 2 minutes. Pour in chickpeas and liquid and blend until creamy, 2 to 5 minutes.
Transfer to an airtight container and chill in the refrigerator for at least 2 hours before serving. Garnish with green onions to serve.