I want to say (as a caption to a picture "are these sake and strawberry flavored Kit Kats? Yes, they are!" The picture has two small Kit Kats, one of each flavor, if that matters.
I've come up with 「これは日本酒とイチゴ風味のキットカットですか。はい！」
The "sake and strawberry flavored Kit Kat" is mostly a literal translation from English, so I'm fairly sure I'm missing some nuances there. It seems like there's also a few different ways to say flavor, so I picked one that looked like it fit best from Jisho.org.