Roast it properly with ちゃんと
Vocabulary Explanation: Do it properly with ちゃんと

Masaki’s dream job making coffee turns out to be nothing like he expected, as he’s put to work sorting out good beans from bad. When he finally has the chance to roast beans, he’s eager to use the fancy roasting machine, but he’s instead given a handheld coffee roaster to hold over a portable stove’s flame.
- エゾリスA:
- 「ほらほら ちゃんと揺すらないと〜」
- “Come on, come on. You have to shake it properly.”
- エゾリスB:
- 「一部
( だけ焦( げちゃうわよ〜」- “Parts of it might get burnt.”
- マサキ:
- 「うるさいなあ」
- “Hush up!”
Key Points
ちゃんと = the right way
Here ちゃんと means Masaki needs to shake the roaster correctly and carefully, not just “somehow”.
The point is that there is a proper technique for roasting evenly.
揺
( すらないと = if you don’t shake it〜ないと gives a practical consequence: if he does not shake it, a problem will happen.
In context, the missing result is supplied by the next line about beans burning.
The two lines work as one warning
ほらほら pushes him along: “come on, come on”.
一部
( だけ 焦( げちゃうわよ explains why the shaking matters: only part of the batch may burn.
〜ちゃう adds an unwanted-result nuance
焦
( げちゃう is a contraction of 焦( げてしまう.It suggests an accidental or undesirable outcome: the beans could end up getting scorched.