Group · Cereals & grains
Cooked oat bran
Cooked oat bran is the outer layer of the oat grain, simmered in water or milk until it has a soft, porridge-like texture. Once cooked, it soaks up liquid and becomes particularly light: only 40 kcal per 100 g, with about 3.21 g of protein, 11.44 g of carbohydrate and 2.1 g of fibre. A star of weight-loss routines and filling breakfasts, it is valued for its soluble fibre and its fullness effect. Sold in packets or loose, it takes a few minutes to prepare and makes a versatile base, sweet or savoury. Here are its nutritional values and our advice on how to include it in your diet.
Macronutrient breakdown
Nutrition table per 100 g
| Calories | 40 kcal |
| Kilojoules | 167 kJ |
| Protein | 3,3 g |
| Carbohydrate | 11,5 g |
| Fat | 0,9 g |
| Fibre | 2,1 g |
Tips
Cooked oat bran lends itself to a thousand preparations. In the morning, let it swell for 2 to 3 minutes in milk or a plant-based drink, then top it with fresh fruit, cinnamon or a spoonful of yoghurt. In a savoury version, it is a good replacement for semolina or rice in a bowl topped with vegetables. Allow a portion of 30 to 40 g of dry bran (a generous volume once cooked) for a balanced breakfast or snack.
Why is oat bran so popular? Its soluble fibre, including beta-glucans, swells on contact with liquid and prolongs the feeling of fullness. Its moderate glycaemic index makes it a useful carbohydrate for keeping energy steady through the morning. It also provides minerals such as magnesium, phosphorus and iron, as well as B vitamins. With only 40 kcal per 100 g once cooked, it is a great ally if you are watching your weight, as long as you keep an eye on the extras (sugar, honey, peanut butter), which quickly raise the calorie density.
- Storage: keep the dry bran in an airtight jar, away from moisture. Once cooked, it keeps for 2 to 3 days in the fridge, perfect for batch cooking.
- Smart pairings: red berries, banana, fromage blanc, chia seeds for a complete bowl.
- Cooking: choose gentle cooking to preserve its texture and qualities, as explained in our guide to gentle cooking.
For active people, cooked oat bran is an excellent source of slow-release complex carbohydrate. Eaten 1 to 2 hours before exercise, it provides lasting energy without a sudden spike in blood sugar. For recovery, pair it with a source of protein (Greek yoghurt, fromage blanc, or even a little protein powder) to replenish reserves and support the muscles. It also works very well in homemade protein snacks.
If you want to vary your breakfasts, explore the other options in the cereals family, such as oat flakes or a wholegrain muesli. Oat bran remains one of the lightest and most filling choices to start the day off right.