Method
- Start by prepping your dried pasta, olive oil, garlic so the cooking goes quickly.
- Warm a splash of olive oil in a heavy pan over medium heat, then add the yellow onion and cook until soft and fragrant, about 4 to 5 minutes.
- Turn the heat up, add the cacio e pepe, and cook until deeply browned and aromatic.
- Fold in the olive oil and season generously; give everything a minute to come together.
- Taste and adjust, then finish with a knob of butter right before serving.
- Serve warm, ideally with something to soak up the sauce.
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4.6 from 95 cooks.