Tallow

Why tallow is rated low

Tallow is beef fat that has been rendered until nearly all that is left is the fat itself, with negligible carbohydrate and nothing fermentable in it. No FODMAP subgroup is recorded against it, and its rating is estimated from that composition rather than from a weighed serving, which is why the ladder is qualitative and holds at one rung: "Any typical portion": LOW. Cooking with it does not add to a meal's FODMAP total. The important qualifier is that tallow is a carrier: whatever goes into the pan with it, and whatever it is rendered from, decides what actually reaches the plate.

What changes your risk

• How it was rendered Fat skimmed off a stockpot that contained onion and garlic is not plain tallow, because the fat lifted off the top comes up with some of the stock liquid clinging to it, and that liquid is where the onion and garlic have gone. Tallow rendered from plain beef fat on its own does not have that problem.
• What goes into the pan Roast potatoes in tallow stay low. Roasting onion or garlic in the same tray does not change the fat, since these carbohydrates are water-soluble and do not dissolve into oil or fat, but the onion and garlic are still on the tray and still on the plate, along with the juices they release into the pan.
• Labels on seasoned tubs Some tubs sold as cooking fat or dripping include stock solids, onion powder, garlic powder or yeast extract. Those are the ingredients that carry the load, so the list on the back is more useful than the front of the label.
• Roasting does not lower FODMAPs Heat does not destroy them, and nothing leaves food that is roasted or fried. Only boiling in plenty of water and tipping the water away removes some of the water-soluble ones, which is the opposite of what a tray of tallow-roasted vegetables does.
• Stacking across the meal Tallow contributes nothing on its own, but low is per food rather than per meal. Everything else on the plate, and anything eaten within a few hours of it, still counts toward one total.

What else works

Tallow needs no replacing, so the neighbours are the point: lard, plain cooking oils and other single-ingredient rendered fats all behave the same way, and garlic-infused oil is the one that adds savoury depth without carrying fructans, as long as no solid pieces of garlic are left in it. The forms that are not equivalent are the seasoned and blended ones: dripping poured off a roast that sat on a bed of onion, savoury fat spreads made with stock or yeast extract, gravy built on that dripping and thickened with wheat flour, and suet-based puddings and pastries where the fat is bound up with wheat.

How to keep it low

Buy tallow as a single-ingredient tub and read the back for stock solids, onion powder or garlic powder before it goes in the basket. It keeps well sealed in a cool cupboard or the fridge, and a clean dry spoon each time stops stray food from getting stirred in. If rendering at home, start with plain beef fat trimmings and water rather than skimming a pot that already held onion and garlic, because the skimmed fat comes up with some of that liquid. For roasting, heat the tallow in the tray first and add plain vegetables, keeping onion and whole garlic out of the same tray so what comes out of the oven is as clean as what went in.

Common questions

is tallow low fodmap

Yes. Plain beef tallow is LOW at "Any typical portion", a rating estimated from its composition as rendered fat with negligible carbohydrate, and no FODMAP subgroup is recorded for it.

is tallow ok on the elimination phase

Single-ingredient rendered tallow fits the low FODMAP elimination phase, since it holds at LOW for "Any typical portion". What needs checking is any seasoning blended into it and what it is cooked with.

are roast potatoes cooked in tallow low fodmap

The tallow and the potatoes are both low, so the tray stays low as long as onion and garlic are kept out of it. The fat itself does not pick anything up from them, but an onion roasted in the same tray is still an onion on the plate, and its juices end up in the pan.

is tallow the same as beef dripping

Not always. Tallow is rendered beef fat on its own, while dripping is often poured off a roast that cooked with onion, garlic or a stock base, and the skimmed fat comes up carrying some of those pan juices with it.