This is how I've been making hummus. I don't add oil, because the tahini seems to provide enough. This recipe makes around 12 oz and costs $1.82. In comparison, the brand I often buy contains only 10 oz and costs $3.99. Since I've been making my own hummus, it's one less thing I have to buy in plastic.
One batch (approximately 1.5 cups)
Tip: heat the chickpeas! Microwave them or use freshly-cooked chickpeas. They will blend much more smoothly.
1) In a blender or food processor (I use an immersion blender), blend the lemon juice, tahini, garlic and water (or chickpea cooking liquid) for about a minute or until it becomes "whipped."
2) Add everything else and blend until smooth.