Group · Bread
Rusks (biscotte)
The biscotte is sliced bread baked twice (bis cocta) until almost all its water has evaporated. This dehydration is what makes it crisp, and what concentrates everything it contains.
In terms of nutrition facts, with no added salt: 402 kcal per 100 g, with 74.7 g of carbohydrates, 11.6 g of protein, 5.6 g of fibre and 5.1 g of fat. This version contains only 0.0075 g of salt per 100 g.
Macronutrient breakdown
Nutrition table per 100 g
| Calories | 402 kcal |
| Kilojoules | 1700 kJ |
| Protein | 11,6 g |
| Carbohydrate | 74,7 g |
| Fat | 5,1 g |
| Fibre | 5,6 g |
Micronutrients per 100 g
All measured nutrients, ranked by share of the daily reference intake.
- Manganese0,67 mg34 %
- Vitamin B10,21 mg19 %
- Copper0,18 mg18 %
- Vitamin E1,99 mg17 %
- Phosphorus110 mg16 %
- Iron1,4 mg10 %
- Zinc0,94 mg9 %
- Potassium186 mg9 %
See the other 9 nutrients
- Omega-6 LA0,93 g9 %
- Magnesium30,1 mg8 %
- Omega-3 ALA0,11 g6 %
- Selenium3 µg5 %
- Vitamin B50,31 mg5 %
- Vitamin B30,64 mg4 %
- Calcium25,1 mg3 %
- Vitamin A9,25 µg1 %
- Vitamin K10,63 µg1 %
Anses Ciqual 2025. Source: Anses, 2025, Ciqual food composition table
Tips
402 kcal against 253 for bread: the gap is misleading. It is the water that is missing, not something added. A biscotte weighs 8 g, a slice of bread 30 g: per piece, the biscotte is lighter. The per-100 g table misleads.
The standard version is very salty. This one is « no added salt »; ordinary biscottes contain roughly two hundred times more. Check the label, as the difference is considerable.
Its glycaemic index is higher than that of bread. Double baking has broken down the starch. So it is not the « light » alternative to bread that people often imagine.
5.6 g of fibre: decent for a wheat product. Wholemeal versions go even higher, and that is the only criterion that genuinely improves the product.
It keeps for months. That is its purpose: no water, no mould. Keep it away from damp, otherwise it softens and loses all its appeal.