National Raisin Bran Cereal Day is observed worldwide every November 15, celebrating one of the best-known breakfast cereals. The cereal, which consists of bran flakes and raisins, was first invented in the 1920s, with Skinner's Raisin Bran being the first brand on the market. Although raisin bran is known for its high dietary fiber content, it has faced criticism for its sugar levels, as raisins naturally contain fructose. To mark the occasion, people often enjoy the cereal for breakfast or use it in recipes, such as raisin bran muffins. A simple recipe involves combining Raising Bran cereal with buttermilk, flour, baking soda, salt, eggs, sugar, and oil, then baking the mixture in muffin cups.