Someone that is called a milktoast is considered to be what?

Milktoast or Milquetoast is an American English dysphemism for a weak, timid, or bland person.
The word milquetoast derives from the name of Caspar Milquetoast, a diffident character in H. T. Webster's comic strip The Timid Soul.[1] The comic strip first ran in 1924 in the New York World; it was later published in the Herald Tribune.[2]

https://en.wikipedia.org/wiki/Milquetoast

More accurately, they would be called a Milquetoast, from:
"milque·toast (mlktst) n. One who has a meek, timid, unassertive nature.

[After Caspar Milquetoast, a comic-strip character created by Harold Tucker Webster (1885-1952).]

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milquetoasty adj.
Word History: An indication of the effect on the English language of popular culture is the adoption of names from the comic strips as English words. Casper Milquetoast, created by Harold Webster in 1924, was a timid and retiring man named for a timid food. The first instance of milquetoast as a common noun is found in the mid-1930s. Milquetoast thus joins the ranks of other such words, including sad sack, from a blundering army private invented by George Baker in 1942, and Wimpy, from J. Wellington Wimpy in the Popeye comic strip, which became a trade name for a hamburger. If we look to a related form of popular culture, the animated cartoon, we must of course acknowledge Mickey Mouse, which has become a slang term for something that is easy, insignificant, small-time, worthless, or petty." -from http://www.thefreedictionary.com/Milquetoast

See also: "Milquetoast, Casper the timid soul; easily controlled by others. [Comics: The Timid Soul"
-see http://encyclopedia2.thefreedictionary.com/Milquetoast%2c+Casper
and https://en.wikipedia.org/wiki/Caspar_Milquetoast

The so-called comfort food is usually spelled "milk toast", as this reference says, not to be confused with milquetoast, the timid person.
https://en.wikipedia.org/wiki/Milk_toast
Actually it sounds much like bread and butter pudding, which is delicious.