you mean the full sentence of: "My lubimy mleko i ciasteczka"? it is correct, though we often tend to skip the personal pronoun (e.g. my, ty, ja) in such sentence as you can tell which person it is about just by looking at the form of verb (basically, all about conjugation)
I try to learn both of languages here. Trust me it is halpfull . It economy your time. You not atract to your native. Jast imagin situacion where you incedently apiared in random country.