Cake typically has a glycemic index of between 65 and 75, making it a medium to high GI food. This means that eating cake can raise your blood sugar fairly quickly, especially if it's made with white flour and lots of sugar. Of course, the type of cake, the amount of sugar, fat, and how it's prepared all play a role in the final GI number.
What is the glycemic index of cake?
The glycemic index of most types of cake is around 68; therefore, cake is considered a food with a medium to high glycemic index.
What does the glycemic index of cake mean?
The glycemic index, or GI, is a measure of how quickly a food raises blood sugar. The higher the GI number of a cake, the faster it will raise blood sugar. Cakes made with white flour and high sugar content tend to have a faster effect on blood sugar, while whole-wheat or low-sugar cakes tend to cause a more gentle rise in blood sugar.
Glycemic index table for cakes
| Consumption mode | Glycemic Index (GI) |
|---|---|
| Simple homemade cake | 65 |
| Sweet industrial cake | 72 |
| Whole wheat cake | 55 |
| Chocolate cake | 68 |
What factors change the glycemic index of a cake?
Cooking and preparation method
Baking for longer or using refined sugar and flour can increase the GI of a cake. In contrast, using fiber, nuts, or wholemeal flour will slow down the absorption of sugar.

Amount of processing and form of consumption
Commercial cakes usually have a higher glycemic index than homemade ones because they contain added sugar, white flour, and more additives. Also, soft, light cakes are digested more quickly.
Combining cake with other foods
Eating cake with protein, dairy, or nuts can slow down the rise in blood sugar. For example, eating cake with Greek yogurt or almonds is a more balanced choice.
Is cake suitable for diabetics?
Cake should be consumed with caution by diabetics. Due to its relatively high glycemic index, excessive consumption can cause blood sugar fluctuations. Choosing a cake that is low in sugar, whole grains, and consumed in small quantities would be a better option.

Frequently Asked Questions About the Glycemic Index of Cakes
Does baking increase the glycemic index of a cake?
Yes, using heat and processing flour usually speeds up the digestion of carbohydrates and can increase the glycemic index.
What is the difference between glycemic index and glycemic load?
The glycemic index only shows how quickly blood sugar rises, but the glycemic load takes into account not only the speed but also the amount of carbohydrates consumed.
What is the best way to consume cake to control blood sugar?
Consuming small amounts of cake along with sources of protein and fiber, choosing low-sugar cakes, and avoiding fasting helps to better control blood sugar.

Final summary
The glycemic index of cake is usually in the medium to high range and can cause a rapid rise in blood sugar. The type of ingredients, the amount of sugar, and the method of preparation have a direct impact on its GI. If blood sugar control is important to you, it is best to consume cake in small amounts and in moderation.
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Source of nutritional data: FoodData Central – USDA

