Olive oil and butter are both kitchen staples, but they behave very differently when heated and have distinct flavour profiles. Choosing the right one makes a real difference in the dish.
Smoke Points
Butter: ~175°C (347°F) — lower because of milk solids, which burn easily.
Extra-virgin olive oil: ~190°C (374°F) — slightly higher than butter.
Light/refined olive oil: ~240°C (464°F) — much higher, suitable for high-heat cooking.
Clarified butter (ghee): ~250°C (482°F) — milk solids removed, very high smoke point.
When to Use Butter
- Baking: Butter adds richness, flavour, and structure. Its water content creates steam that helps pastry layers. Olive oil can't replicate this.
- Finishing sauces: A knob of butter stirred in at the end creates a glossy, rich emulsion (beurre monté).
- Sautéing delicate things: Butter's lower smoke point is actually beneficial when you want gentle, low-heat cooking — like cooking eggs or sweating aromatics slowly.
- Anything where dairy flavour is desired: Pasta sauces, risotto, mashed potatoes.
When to Use Olive Oil
- Mediterranean dishes: Dressings, pasta, pizza, roasted vegetables — olive oil is culturally and flavourally appropriate.
- High heat roasting or searing: Use refined (light) olive oil, which tolerates higher temperatures.
- Cold applications: Extra-virgin olive oil shines in dressings and drizzled raw over finished dishes.
- Vegan cooking: Olive oil replaces butter in almost every savoury application.
Combining Both
Many chefs use a combination: start with olive oil to handle the initial high heat, then add butter at the end for richness and flavour. This is a classic technique for pan sauces and sautéed vegetables.