Hypothesis:  The process of toasting food involves magic. 

Exhibit 1:  Pop-Tarts.  When eaten cold, this breakfast food is merely ok, but surely nothing to write home about.  Employ the use of a magical toaster and voila, you now have a warm, gooey, caramelized treat. 

Exhibit 2:  Buttered bread.  Cold butter on mushy bread?  What are you, homeless?  Pop that thing in the magical mystery machine and you have yourself a delicacy! 

Exhibit 3:  Sandwiches.  Ham and cheese on white = lower case mmm.  The magic of toast compels you, and now you have upper case MMM. 

Conclusion:  As usual, I'm right.  Also as usual, magic is involved.