When Haruki first developed the Original Sesame blend in 2017, he used light brown sugar, the same as most granola recipes. The result was sweet in a way that felt one-dimensional: a sharp hit at the front of the palate, then nothing. A friend who ran a small confectionery in Yokohama suggested trying kokuto, the unrefined black sugar made in Okinawa. The first test batch with kokuto was noticeably different, and the change became permanent.
What kokuto actually is ¶
Kokuto is made by pressing sugarcane juice and drying it slowly without centrifuging. The centrifuging step, which is standard in refined sugar production, removes the molasses fraction and most of the minerals. Kokuto retains both. The result is a dark, slightly moist sugar with a flavour that has notes of caramel, molasses, and something faintly mineral. It is produced almost exclusively in Okinawa and the Amami Islands, and the quality varies considerably between producers. We use kokuto from a small cooperative in Itoman, Okinawa.
How it behaves differently in the oven ¶
Refined white sugar caramelises at around 160°C. Kokuto begins caramelising at around 140°C because of its higher moisture content and the presence of invert sugars from the molasses fraction. At our roasting temperature of 155°C, kokuto is actively caramelising throughout the 28-minute roast. This produces a more even coating on the oats and a deeper colour without requiring a higher temperature. Refined sugar at 155°C would barely caramelise at all, leaving the oats pale and under-coated.
The flavour difference in the finished granola ¶
The most noticeable difference is in the aftertaste. Refined sugar leaves a clean, sharp sweetness that fades quickly. Kokuto leaves a longer, more complex finish with a slight mineral note. This is not to everyone's taste: some people find it slightly unfamiliar at first. But most regular customers tell us they find commercial granola too sweet after eating Cedar Vaultline for a few months. The kokuto sweetness is lower on the glycaemic index than refined sugar, which means the energy release is slower and the crash is less pronounced.
Why we do not use honey or maple syrup ¶
Both honey and maple syrup are common granola sweeteners and both produce good results. We do not use them for two reasons. First, the flavour of honey or maple is strong enough to compete with the other ingredients in blends like Matcha and White Sesame or Hojicha and Walnut, where we want the tea note to be the dominant flavour. Second, kokuto is a Japanese ingredient with a specific regional identity that fits the character of the brand. Using a Canadian or New Zealand sweetener would feel inconsistent with the sourcing philosophy.
Kokuto is not a health claim. It is a flavour decision that also happens to have a lower glycaemic impact than refined sugar. If you want to taste the difference, the Original Sesame blend is the clearest expression of what kokuto does in a granola.