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OFFAL · Specialty cut

Omasum

Third stomach · bible tripe · センマイ

Omasum
Lucarelli · Public domain

Hundreds of thin leaf-like folds stacked like a book — the third stomach. That geometry shreds into a unique chew, and with almost no fat it is the lowest-calorie cut in this atlas. Most often eaten raw with sesame-oil dipping sauce.

Profile

Tenderness30
Fat18
Umami66
Price28

Pairs with

Raw beef dishes85
Stir-fry68
Frying62

Recommended cooking

Raw or flash-blanchedHeat toughens it

Heat collapses the folds fast. Even a blanch is only a few seconds in boiling water.

How to pick it

Black membrane removed, folds sharp and clean. Scrub with coarse salt several times to clear the smell.

Signature dishes

Grading & naming

Almost no fat — buy for snap and clean smell.

Grading systems →

Nutrition · Per 100 g raw edible portion

80kcalCalories
14gProtein
2gFat
0.7gSaturated fat

Calories & protein →

Next steps

Compare with

→Omasum vs Liver→Omasum vs Rumen→Omasum vs Abomasum

Keep exploring

→Rumen→Abomasum→Liver

Find a cut by cooking

→Raw beef dishes→Stir-fry→Frying

Signature dishes

→Seasoned raw omasum→Quick stir-fry

→Beef Offal Map

All cuts

Beef Primals

→Chuck→Ribeye→Striploin→Sirloin→Round→Brisket→Short plate→Flank→Shank→Head & cheek→Oxtail

Pork Primals

→Jowl→Shoulder→Picnic shoulder→Loin→Tenderloin→Belly→Leg→Hock & trotter

Lamb Primals

→Neck→Shoulder→Rack→Loin→Leg→Shank→Breast

Chicken Portions

→Breast→Wing→Thigh→Drumstick→Tenderloin→Oyster

Beef Offal Map

→Tongue→Heart→Liver→Rumen→Abomasum→Small intestine→Large intestine

Bluefin Tuna Cuts

→Kama→Akami→Otoro→Chutoro→Tail belly

← Back to the chart

Temperatures are guidance for whole-muscle cuts. Ground meat and poultry need 71°C / 160°F throughout.