YOU SAID:
I like kissing my girlfriend while she is cooking some good food.
INTO JAPANESE
彼女がおいしい料理を作っている間に彼女にキスするのが好きです。
BACK INTO ENGLISH
I like to kiss her while she cooks delicious food.
INTO JAPANESE
私は彼女がおいしい食べ物を調理している間、彼女にキスをするのが好きです。
BACK INTO ENGLISH
I like to kiss her while she cooks delicious food.
Come on, you can do better than that.