🧈 Cooking Fats Compared

At a glance

Smoke points are typical ranges. They vary a lot with how refined an oil is, how fresh it is, and how many times it has been heated, so treat them as rough guides rather than exact numbers. Cost tiers compare typical U.S. grocery prices per ounce; prices change.

Sources: [5], [4], [10], [11], [12], [13]

What smoke point means

The smoke point is the temperature at which a fat starts to smoke and break down. The biggest factor is how much protein and free fatty acid the fat contains, which is why refined oils usually have higher smoke points than unrefined (“virgin,” “cold-pressed”) ones. A fat’s smoke point also drops each time it is reused for frying.

In the kitchen: if a pan of oil starts smoking, turn the heat down. Butter browns and burns at lower heat than oil because of its milk solids; ghee, which has them removed, handles higher heat.

Sources: [5], [4]

How each one is made

• Seed oils (canola, soybean, corn, sunflower, safflower, cottonseed, grapeseed): Nebraska Extension reports that about 70% of seed oil is made by chemical extraction, usually with hexane, which gives a higher yield but needs more refining; about 20% by mechanical pressing; and about 10% by pressing followed by solvent extraction. Refining has five steps: extraction, degumming, neutralizing, bleaching and deodorizing, which remove phospholipids, free fatty acids, color and odors. Bottles labeled “expeller-pressed” or “cold-pressed” are pressed without solvents.
• Olive oil: extra-virgin and virgin olive oils are graded by acidity and taste. Refined olive oil is odorless and nearly tasteless; plain “olive oil” is a blend of refined and virgin oils, and “extra light” is mostly refined.
• Avocado and coconut oil: pressed from the fruit or coconut meat, then sold either unrefined (virgin) or refined.
• Butter: cream is churned until the butterfat separates from the buttermilk.
• Ghee: butter is simmered, the foam is skimmed off, and the clear fat is poured away from the browned milk solids. The longer simmer gives ghee its nutty taste.
• Tallow and lard: raw beef fat (tallow) or pork fat (lard) is cleaned and slowly heated to separate the fat from the protein and water. This is called rendering.

Sources: [4], [10], [12]

What they are made of

All cooking fats are mixtures of saturated, monounsaturated and polyunsaturated fat; they differ in the proportions. Two polyunsaturated fats are essential, meaning the body cannot make them: linoleic acid (an omega-6) and alpha-linolenic acid (an omega-3). The table below shows the make-up of each fat per 100 grams, from USDA FoodData Central.

Nebraska Extension gives these rough shares of total fat: tallow about 50% saturated, 40% monounsaturated, 4–5% polyunsaturated (omega-6 to omega-3 about 5:1); butter about 65%, 30%, 3–4% (about 10:1); soybean oil about 15%, 25%, 55% (about 8:1); canola oil about 7%, 65%, 28% (about 2:1); and high-linoleic sunflower oil about 11%, 29%, 60% (about 120:1).

SaturatedMonounsaturatedPolyunsaturated

Sources: [14], [4]

What the Dietary Guidelines say

The current edition is the Dietary Guidelines for Americans, 2025–2030, released by HHS and USDA on January 7, 2026. Its section “Incorporate Healthy Fats” says:

“When cooking with or adding fats to meals, prioritize oils with essential fatty acids, such as olive oil. Other options can include butter or beef tallow.”

“In general, saturated fat consumption should not exceed 10% of total daily calories.”

“More high-quality research is needed to determine which types of dietary fats best support long-term health.”

The same section says healthy fats are found in many whole foods, such as meats, poultry, eggs, omega-3-rich seafood, nuts, seeds, full-fat dairy, olives and avocados, and that significantly limiting highly processed foods will help keep saturated fat under the 10% limit. On a 2,000-calorie day, 10% is 200 calories, or about 22 grams of saturated fat. (The FDA Daily Value used on food labels is 20 grams.)

Sources: [1], [2], [3], [15]

The seed oil debate

Whether seed oils are good or bad for health is argued about loudly. Here is what each side says, as plainly as we can put it.

• What critics argue. Seed oils are heavily processed, often with solvent extraction and high-heat refining. They are rich in omega-6 linoleic acid, which critics link to inflammation, especially when diets are low in omega-3s. Their polyunsaturated fats are more sensitive to heat, light and air than saturated fats. And much of the seed oil Americans eat comes in fried and highly processed foods. Critics also point to re-analyses of two old trials: in the Minnesota Coronary Experiment (1968–73), replacing saturated fat with linoleic-acid-rich oil lowered cholesterol but did not lower deaths, and the authors reported that recovered data from the Sydney Diet Heart Study showed higher death rates in the linoleic acid group.
• What major health bodies say. A 2017 American Heart Association advisory concluded that replacing saturated fat with polyunsaturated vegetable oil lowered cardiovascular disease by about 30% in controlled trials, and that coconut oil raises LDL (“bad”) cholesterol without known benefits. Researchers at the Harvard T.H. Chan School of Public Health say the oils are safe and beneficial; one notes that of dozens of studies on omega-6 fats and inflammation, about half found no effect and the other half found lower inflammation markers, and they attribute harm to the processed foods rather than the oils. The 2025–2030 Dietary Guidelines name olive oil first, list butter and beef tallow as other options, keep the 10% saturated fat limit, and say more high-quality research is needed.
• Where the evidence is limited. The large diet trials are decades old and hard to repeat. Much of the rest is observational, which shows links rather than cause and effect. And the official advice itself has shifted in emphasis, as the newest guidelines’ call for more research shows.
• Where nearly everyone agrees. Get most fat from whole foods, eat fewer highly processed and deep-fried foods, do not let oil smoke, do not reuse frying oil over and over, and store oils away from heat and light.

Sources: [4], [9], [6], [7], [8], [1]

Storing fats

• Seed oils: cool, dark cupboard. Unopened bottles keep several months at room temperature and up to a year in the fridge. Light, heat and air make them go stale (rancid) faster.
• Olive oil: keep away from light and heat; avoid bottles that have sat under bright store lights. Do not refrigerate virgin olive oil (condensation hurts the flavor). Use virgin oils within about 18 months of harvest.
• Butter: the most perishable. Refrigerate; once opened it keeps a few weeks, salted a little longer than unsalted. Freeze up to a year.
• Tallow and lard: the most shelf-stable. Airtight, they keep for months at room temperature and over a year in the fridge or freezer.
• Ghee: sealed jars keep in the pantry; keep it out of direct light, and refrigerate for the longest life.
• A fat that smells stale, bitter or “off” has gone rancid; throw it out.

Sources: [4], [10], [12]

In these recipes

Recipes name the fat that works best, but most are flexible. Any neutral oil can stand in for another. Olive oil works for roasting and sautéing at the oven and stove temperatures used here. Butter can usually be swapped for oil one for one in savory cooking; in baking, keep the fat the recipe names. Each recipe that uses a fat links back to this guide.

Sources

1. Dietary Guidelines for Americans, 2025–2030 (released January 7, 2026), U.S. Department of Health and Human Services and U.S. Department of Agriculture. Accessed 2026-10-25.
2. Current Dietary Guidelines, Office of Disease Prevention and Health Promotion (HHS). Accessed 2026-10-25.
3. Fact Sheet: Trump Administration Resets U.S. Nutrition Policy, Puts Real Food Back at the Center of Health (January 7, 2026), HHS. Accessed 2026-10-25.
4. The Big Fat Comparison: Tallow, Butter, and Seed Oils as Culinary Options (NebGuide G2369, April 2026), University of Nebraska–Lincoln Extension. Accessed 2026-10-25.
5. Smoke point, Wikipedia. Accessed 2026-10-25.
6. Sacks FM et al. Dietary Fats and Cardiovascular Disease: A Presidential Advisory From the American Heart Association. Circulation, 2017 (summary), American College of Cardiology. Accessed 2026-10-25.
7. Are seed oils healthful or harmful? (February 27, 2025), Harvard T.H. Chan School of Public Health. Accessed 2026-10-25.
8. Dietary Guidelines for Americans 2025–2030: Progress on added sugar, protein hype, saturated fat contradictions (January 9, 2026), The Nutrition Source, Harvard T.H. Chan School of Public Health. Accessed 2026-10-25.
9. Ramsden CE et al. Re-evaluation of the traditional diet-heart hypothesis: analysis of recovered data from Minnesota Coronary Experiment (1968–73). BMJ 2016;353:i1246, PubMed Central (NIH). Accessed 2026-10-25.
10. How to Purchase Olive Oil, Oklahoma State University Extension. Accessed 2026-10-25.
11. General Butter Information, Dairy Research and Information Center, UC Davis. Accessed 2026-10-25.
12. Ghee, Wikipedia. Accessed 2026-10-25.
13. Tallow, Wikipedia. Accessed 2026-10-25.
14. FoodData Central (SR Legacy), USDA Agricultural Research Service. Accessed 2026-10-25.
15. Daily Value on the Nutrition and Supplement Facts Labels, U.S. Food and Drug Administration. Accessed 2026-10-25.