[xMenace]

You have to be able to rule out all other causes such as other foods, activity, sickness, stress, sunspots, etc. I think you need a bit ore structured testing before making any conclusions. I eat Flax bread as it is very BG friendly. Try the muffins without cinnamon. Sweet potatos are also quite friendly.

Household cinnamon is usually the wrong type. You need 'cassia' cinnamon. I've never looked into sources or doses.