Tart
Food · Grain · Food, Typed Supps
The custard is basically baked milk and egg; the pastry around it is where the fat and salt are.
Stage by stage
- Intake (Chewing separates the layers): Pastry and set custard break down at different rates; the custard is already heat-set.
- Digestion (Mixed macronutrient load): Gelatinised pastry starch digests fast; custard protein slows stomach emptying.
- Absorption (Split by layer): Fat and sodium come from the pastry; protein, calcium, iodine and B12 from the custard.
- Downstream (Lipid handling): Unused energy is stored; the saturated fat load only matters with regular intake.
Time to effect
- Under an hour: Blood glucose rises within roughly 30 to 60 minutes, moderated by the custard's protein and fat.
Allergens
None of the fourteen major allergens. Derived from what this food is, not from a product label.
Eating patterns
Fits: Vegan, Vegetarian, Pescatarian, Halal, Kosher, Gluten-free. Depends on the product: Low-FODMAP.
Satiety
107 on the satiety index, where white bread is 100 — moderate. Modelled from the Holt et al. (1995) measurements.
Environmental footprint
1.6 kg CO2e and 648 litres of freshwater per kg, matched to "Wheat & rye" in Poore & Nemecek (2018), Science 360.
Cost band
Cheap — roughly £2.5 per kg, as a band midpoint rather than a price.
Key nutrients
Nutrition per 100g
- Calories: 242
- Protein: 6.3g
- Carbohydrate: 30.2g
- of which sugars: 11.4g
- Fat: 10.7g
- of which saturated: 5.2g
- Fibre: 1g
- Sodium: 270mg
Food vs. supplement
Not a meaningful comparison. The calcium and iodine here are real but incidental, and nobody should be eating custard tarts to reach either target — a glass of milk supplies both with none of the pastry.
Kitchen tip
Made at home the ratio is adjustable in a way it is not off the shelf: a thinner pastry case or a filo shell cuts most of the saturated fat and salt while leaving the custard, which is the part carrying the protein and calcium, untouched.
Common myth
"A custard tart is the sensible bakery option because it is mostly milk and egg." In reality: The custard does add protein, calcium and iodine that a jam tart or a doughnut lacks. The shortcrust case still delivers around 5g of saturated fat and a good deal of salt, and it remains a discretionary food.
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