When my sister and I were younger, we would spend most of our school holiday vacations with my paternal Grandparents.
My Gramma always had boxes of healthy/natural cereals around her house, including a box of Grape Nuts cereal.
I was always up for trying something different than we had at home.
I thought that it was good. It was really crunchy and crispy.
Kind of like eating really crunchy granola cereal.
I don’t remember what was in it, but it probably was really toasted.