I did not actually test this one, because I am not allowed to make hummus.  However, a source I trust says this is about right.

3 T olive oil
15 oz garbanzo beans (if you start from dry, they do need to be boiled before being mushed, can’t just soak them)
1/2 c tahini
2 T fresh lemon juice
1/2 tsp salt
red pepper flakes

(I’d add some garlic, too, probably roasted first)

Mash garbanzos, add tahini, oil, lemon juice, salt, and red pepper.  Drizzle with a little more olive oil before serving.