I agree with all of the above advice so far. You are not making a rod for your own back, you are teaching her that she is comforted and knows her mummy.
And 100% second you having a look in to Dr Jay Gordon blog. He highlights the need for babies (yes she is still a baby even at 12 months, she is completely dependent on an adult) to feed and feel love and attachment, even during the night. But he also highlights that today's society is driven to "fixing" babies sleep, when it doesn't actually need fixing; just a little tweaking.
Have a read, print it out and also get your husband to read it. I literally handed it to my DH and said we are doing this in 3 weeks, be prepared. So we planned, worried it wouldn't work and the result was a pretty painless stopping of night feeding between 11pm and 6am every night. Our dd nailed it in 2-3 days and it wasn't upsetting for her or me.
You might read it and think, you know what, I'll leave it a few weeks and that's fine too. Go off your own gut instinct. I read it at 11 months and wasn't ready, so I went back to it at 14 months and we were totally ready. I saw a significant different in her solid food intake during the day - she was eating well anyway, but all of a sudden she upped her game with eating. So constantly offer snacks and food to her throughout the day, as well as water too.
Dr Jay Gordon Blog
In terms of a pattern or routine, you need to really follow hers. Have you read No Cry Sleep Solution book? If not, I have a copy and I am happy to give it to you/post it. It taught me to really read the cues of her sleep and also what you are doing each night before bed (noise, light, stimulation etc) and then work around that. You will have some babies that want to sleep 9pm - 8am, and others who like an early night (7pm - 5.30am) and that is just their natural sleep pattern. You have to find hers and work around it and as she gets older, it will pad out longer in the evening (going to bed earlier) and sleeping in.
As much as routine is a bit like marmite for some, a pattern at bedtime is the best thing you can start. Children like to know what is happening and they like the repetition, so try the same 'things' each night. ie. story, feed, bath, feed, story, bed and repeat it. You will get used to a couple of feeds before bed, but not the last thing before bed, i.e. DH can help out with bed time, so you can start to come away and her not be as reliant on you.
I've gone on enough. I'm sure I can think of more things so will post them later x