The complex carbs in cup cakes are digested fairly quickly, although the exact time digestion takes depends on the amount you eat at a time and the other foods you eat at the same meal.
According to Mayo Clinic, digestion time also varies between individuals and between men and women.
The first stop for food is the esophagus, which moves food from the back of the throat to the stomach. About six to eight hours after eating, food passes through the stomach and small intestine. During this time, food is broken down into liquids and small bits so that the fats, carbohydrates, proteins, vitamins and minerals can be absorbed by the intestinal walls. It then moves on to the large intestine for further digestion and absorption of water.
The actual amount of time that digestion process takes depends on the food you're eating. Meat can take two days to fully digest, while vegetables and fruits take a day or less. Drinking water and high-fiber foods helps the digestive system work more efficiently.
Learn The 5 Most Easily Digested Foods as well as the Best and Worst Foods for Digestion.