Why McDonald's Fries Used to Taste Better: The Beef Tallow Story

What Changed About McDonald's French Fries?

If you've ever heard an older person say "McDonald's fries just aren't the same," they're right — and the reason is beef tallow. From 1940 until 1990, McDonald's cooked their iconic french fries in pure beef tallow. The switch to vegetable oil in 1990 permanently changed the taste, texture, and character of what was once considered the gold standard of fast food fries.

The original McDonald's fries were legendary. They had a distinctive savoury depth, a shatteringly crispy exterior, and a creamy interior that no other fast food chain could match. That flavour profile was entirely due to the beef tallow frying medium — a fact that McDonald's themselves acknowledged when the recipe changed.

Why Did McDonald's Switch from Beef Tallow?

The switch happened because of a campaign by Phil Sokolof, a wealthy businessman who had suffered a heart attack and subsequently dedicated his fortune to fighting saturated fat in the American diet. In 1988, Sokolof took out full-page newspaper ads attacking McDonald's for frying in beef tallow, claiming it was contributing to heart disease.

Under mounting public pressure and guided by the prevailing (but now questioned) dietary science of the era — which vilified saturated fat — McDonald's announced in 1990 that they would switch to "100% vegetable oil." The company chose a blend of soybean and canola oils, which were cheaper and aligned with the anti-saturated-fat messaging of the time.

What Did McDonald's Lose by Switching?

Flavour: Beef tallow contributed a rich, savoury umami quality to the fries that vegetable oil simply cannot replicate. McDonald's eventually added "natural beef flavour" (an extract) to their fry seasoning to try to recreate some of what was lost, but it's widely considered a pale imitation.

Texture: Tallow creates a crisper, more durable exterior that stays crunchy longer. Fries cooked in vegetable oil become limp and soggy faster because the polyunsaturated fats in seed oils penetrate the potato more deeply, creating a greasier result.

Stability: Beef tallow could be reused many more times than vegetable oil before degrading. This was actually more economical for restaurants and produced more consistent results batch after batch.

Was the Saturated Fat Concern Justified?

The science that drove the switch has been significantly challenged since 1990. Multiple large meta-analyses published in prestigious journals — including a 2020 review in the Journal of the American College of Cardiology — have found no significant association between saturated fat intake and cardiovascular disease.

Meanwhile, the seed oils that replaced tallow have their own concerns. When heated to frying temperatures, polyunsaturated seed oils produce significantly higher levels of aldehydes and other oxidation products compared to saturated fats like tallow. Some researchers now argue that the switch from tallow to seed oils may have made fast food less healthy, not more.

Can You Recreate the Original McDonald's Fries at Home?

Yes, and it's surprisingly simple. The secret is beef tallow and the double-fry method. Cut Russet potatoes into thin sticks, soak in cold water, dry thoroughly, fry at 150°C in tallow for 5-7 minutes (blanching), let cool, then fry again at 190°C for 2-3 minutes until golden. Season with salt immediately. The result is remarkably close to what people remember from pre-1990 McDonald's.

Use our Organic Grass-Fed Beef Tallow for the frying medium — you'll actually get a nutritionally superior version of the original since grass-fed tallow contains more omega-3s, CLA, and vitamins than the conventional tallow McDonald's used. Or try our ready-made Beef Tallow Fries 500g for the convenience without the work.

Frequently Asked Questions

Do any fast food chains still use beef tallow?

Five Guys uses peanut oil, Chick-fil-A uses refined peanut oil, and most major chains use seed oil blends. Some smaller, premium burger chains have returned to tallow frying as consumer awareness of seed oil concerns grows. In the UK, many fish and chip shops still use beef dripping (tallow) for traditional chips.

Can you taste the difference between tallow and oil fries?

Most people can immediately taste the difference in a side-by-side comparison. Tallow fries have a richer, more savoury flavour with a crispier texture that lasts longer. Vegetable oil fries taste flatter and become limp more quickly. The difference is particularly noticeable when fries cool down — tallow fries retain their crunch far better.

Is McDonald's considering switching back to beef tallow?

There's no official indication that McDonald's plans to return to tallow frying. However, the growing anti-seed-oil movement and consumer demand for "traditional" foods have created public pressure. Some food industry analysts speculate that as saturated fat continues to be rehabilitated in public perception, fast food chains may eventually reconsider.