No.
Why would you think to capitalize the word vanilla any more than you would think to capitalize strawberry, chocolate, or mint?
There are, of course -and as always-, exceptions.
1.) Capitalize if the flavor is a brand name, in other words, a registered trademark.
also:
2.) Capitalize any word in a flavor name (or anything else) which is the name or adjective form of a country, state, city, region or any other proper name.
Examples of these exceptions:
Do you like my Grand Marnier cupcakes?
Here are some Drambuie cupcakes.
I could eat a dozen French vanilla cupcakes!
Mom baked two German chocolate layer cakes.
"I love Boston cream pie!"
Have a glass of Tahitian vanilla coconut milk.
"This isn't just any old chocolate bar. It's is a yummy Brazilian chocolate one!"
"My favorite treat at Basin-Robbin's is their Rootn' Tootn' Rum Chocolate ice cream."
(In this case even 'rum' and 'chocolate' are capitalized because they're parts of a registered trademark, hence the whole group of words is one proper name.)
"My sister is a baker. She invented a super new flavor of cream puff. She calls them her Montenegro Vanilla cream puffs" (Here vanilla is capitalized because it's part of a registered proper name and may or may not taste anything like 'regular' vanilla.)
Get it?
Yes, you should capitalize the word "scurvy" if it is the first word in a sentence or if it is part of a proper noun or title.
You capitalize the word "birthday" at the beginning of a sentence, and no other time.
No, except at the beginning of a sentence because it isnot a propernoun.
No, except at the beginning of a sentence because it is not a proper noun.
No, you do not have to capitalize the word "female" unless it is at the beginning of a sentence or part of a title.
yes why wouldnt it be
Yes, you should capitalize the word after a comma in a sentence.
You do not capitalize chickenpox in a sentence. The exception is if the word is the first in the sentence.
no or at least not any more than i capitalize the word sentence in a paragraph
Yes, you should capitalize the word "scurvy" if it is the first word in a sentence or if it is part of a proper noun or title.
Never. ANSWER: only if the word is the beginning word in the sentence.
no
No.
You do not capitalize the word quarterback unless it is at the beginning of a sentence.
No, the word lunch is not capitalized in a sentence. You would only capitalize it if it was part of a title (e.g. it was a word in a book title).
You capitalize the word "birthday" at the beginning of a sentence, and no other time.
No you do not capitalize artist in a sentence