Why not to say "milk and cookies"?

[Frank Stern]

English Language Tests, Intermediate level

ESL/EFL Test #720 "Real Life: Common Word Pairs in North America (1)", question 7

Oh, Johnny. I know you hurt your foot when you fell but it looks like you're going to be OK now. How about some milk and ......... to make you feel better?

(a) crumbs
(b) cookies
(c) crackers
(d) coffee

English Language Tests, Intermediate level

ESL/EFL Test #720 "Real Life: Common Word Pairs in North America (1)", answer 7

Oh, Johnny. I know you hurt your foot when you fell but it looks like you're going to be OK now. How about some milk and cookies to make you feel better?

Correct answer: (b) cookies

Your answer was: incorrect
Oh, Johnny. I know you hurt your foot when you fell but it looks like you're going to be OK now. How about some milk and coffee to make you feel better?
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In my case I don't like cookies. Why not to say "milk and cookies? doesn't fit also there?

[Mister Micawber]

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No, it is not a good combination. The sentence is about a child, not you.
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Native English teacher at Mister Micawber's