However.... I don't have any dolls clothes patterns! Here are a few that I found on the internet:
A whole selection of patterns if you want to buy them. Minerva Crafts have a huge selection.
Sew Essentials also has a large range of Kwik Sew patterns that you can download, but a bit more expensive.
The best that I've found though, in terms of being both free and incredibly simple - because my niece is only two and I also want to make them quickly - are here on the We Wilsons blog.

I can't wait to get started (though I've a ton of work for my Scout role to do first!) and will post on here again in the next day or two and show you how I got on.
All pictures here are from the websites I've linked to in the text above them.