Starbucks Cinnamon Bun

The Starbucks Cinnamon Bun costs £4.00 and carries 471 calories with 5.7g of fibre and 9.7g of protein. An enriched dough rolled with cinnamon sugar and baked as a spiral.

It is the outlier of the Bakery case in the direction nobody expects. 5.7g of fibre and 9.7g of protein are both the highest in the category, and 13g of fat is by a wide margin the lowest, against 36g in the lemon tart and 29g in the chocolate muffin. Nothing on the menu board communicates any of that.

Bread rather than cake is the whole explanation. A cinnamon bun is a yeasted dough, so it is built from flour, milk and a modest amount of butter, and flour brings protein and fibre with it. A cake or a muffin gets its texture from fat and sugar instead, which is why the numbers separate so sharply between two things sitting in the same case.

Carbohydrate at 76g is the highest in the category and is the flip side of the same fact. Sugar sits at 30g, which is mid range and well below the Victoria sponge at 49g, and salt is 0.45g.

A good bun costs proving time, and that is not something you can buy back. A dough given ninety minutes develops the open, pull apart structure people expect; one rushed through in thirty is dense and bready. That is the main difference between a bakery bun and a supermarket one, and it costs nothing but patience.

Cinnamon itself contributes nothing nutritionally at this quantity, though it does most of the work on flavour. The spiral shape matters more than it looks: it puts a band of cinnamon sugar through every layer rather than on top, so the sweetness is distributed rather than concentrated in a glaze.

Allergens are egg, wheat and milk, with no dietary labels published. Prices reach £4.95 on delivery. The cake pop is the lightest thing in the case at 170 calories.