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olive oil vs butter

How olive oil and butter compare on protein, climate impact, water use, land use, saturated fat and fibre — with a clear verdict.

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The numbers

The numbersolive oilbutter
Protein (g / 100 g)00.9
Climate impact (kg CO₂e / kg)612
Water use (L / kg)14005553
Land use (m² / kg)2633
Saturated fat (g / 100 g)1451
Fibre (g / 100 g)00

The verdict

olive oil is the better everyday choice. It uses less land and water and carries a smaller carbon footprint than butter, while covering the same role on the plate. If protein density is your priority, adjust portion size rather than going back to butter.

Sources: Poore & Nemecek (Science, 2018), FAO, USDA FoodData Central, Mekonnen & Hoekstra (2011).

In depth

The longer answer

Olive oil and butter are both staple fats used in cooking and baking, yet they come from vastly different sources. Olive oil is pressed from olives, a fruit, while butter is churned from cow's milk, an animal product. People often compare them when seeking healthier alternatives for sautéing, dressing salads, or spreading on bread, as each brings distinct flavour and functional properties to the kitchen.

Nutritionally, olive oil is rich in monounsaturated fats and polyphenols, which support heart health, whereas butter is high in saturated fats and cholesterol, which can raise LDL cholesterol levels. Environmentally, olive oil production has a lower carbon footprint and requires less water per kilogram than butter, which involves resource-intensive dairy farming. The key mechanism is that plant-based fats generally offer anti-inflammatory benefits, while animal fats promote inflammation and arterial plaque buildup.

In real life, choosing between them depends on the dish and dietary priorities. For high-heat frying, butter burns easily due to its milk solids, so olive oil is more stable. For baking, butter provides structure and flakiness that olive oil cannot replicate. A practical approach is to use olive oil for everyday cooking and dressings, and reserve butter for occasional treats where its unique texture is essential, balancing health with culinary satisfaction.

At a glance

Quick facts

Quick factsolive oil vs butter
DetailWhat to know
Main fat typeOlive oil: monounsaturated; butter: saturated
Cholesterol contentButter has 215 mg per 100g
Smoke pointOlive oil: 190–210°C; butter: 150°C
Environmental impactButter's carbon footprint is 3x higher

In practice

What this means for you

  • Replace butter with olive oil in most sautéing and roasting for a heart-healthy swap.
  • When baking, try using ¾ cup olive oil per cup of butter called for.
  • For spreading, choose a high-quality extra virgin olive oil with a peppery finish.
  • Avoid using extra virgin olive oil for deep frying; use regular olive oil instead.

FAQ

Common questions

Can I use olive oil instead of butter in cookies?
Yes, but the texture will be softer and less crisp. Substitute ¾ cup olive oil for 1 cup butter, and chill the dough before baking. The flavour will be fruity rather than buttery, so choose a mild olive oil for neutral taste.
Is olive oil healthier than butter for frying eggs?
Generally yes, because olive oil's monounsaturated fats are better for heart health than butter's saturated fats. Use a moderate heat to avoid smoking, and the eggs will cook evenly without burning. Butter adds richer flavour but more cholesterol.
Why does butter taste better than olive oil in some dishes?
Butter contains milk solids and diacetyl compounds that create a creamy, savory richness. Olive oil offers a grassy, peppery note that complements vegetables and grains. Personal preference and cultural cooking traditions often determine which is considered 'better' for a specific dish.

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