This is the 8054th most frequent Russian word.
крупко
"Крупко" is not a standard Russian word; it may be a typo or non-existent term.
The word 'крупко' is used as an adverb to describe the manner of crushing the nuts in a coarse or large way.
Я растолкла орехи очень крупко, чтобы они хрустели.
I crushed the nuts very coarsely so they would be crunchy.
Here, 'крупко' functions metaphorically, implying blunt or straightforward speech.
Это было сказано крупко, но по сути правильно.
It was said bluntly, but essentially correctly.
In this context, 'крупко' describes the coarse or rustic processing of the millet, related to food preparation or consistency.