Chex Cereal Blueberry. Chex Cereal Blueberry. Flavored with other natural flavors. Gluten free. No high fructose corn syrup. No artificial flavors, colors or preservatives. Sweetened rice cereal. General Mills is on a journey to always make our cereals better. Blueberry Chex Cereal has: Whole grain as the first ingredient.A whole grain food is made by using all three parts of the grain. All General Mills Big G Cereals contain more whole grain than any other single ingredient. Make every one berry happy! Exchange: 1 1/2 Starch. Based on Academy of Nutrition and Dietetics and American Diabetes Association criteria. Partially produced with genetic engineering.