Where to find cookies,candy, cupcakes, etc. invitations?

For my birthday party I have decided to have a cookies, candies, and cupcake party. Pretty much cooking but just sweets so thats why I say that. I’m looking for free, printable templates, where i can write the words and stuff! So please help me. I also wanted to know if it was illegal to copy and paste a picture from google onto an invitation and send them out? Please answer both. Oh and when I asked about the template I meant a place online but thank you so much,SeventhSense, because you have a great answer!