I would continue nursing her for a bit longer, but cut out the night time feedings first. You want to go slowly, and at 11 months she doesn't need those 1am feedings anymore. Dad needs to help out here, by stepping in and calming her when she wakes to nurse at 1am. It'll take a few days, and your body will easily adjust to not nursing at that time. Give it a couple weeks, cut that feeding out first. Then work on the morning nap one. That one is usually pretty easy to give up.
The last ones to go should be morning and bedtime. If you follow a slow easy weaning, your body will adjust better, adn so will your child. Cut one feeding out every 2 weeks, so your body can stop making milk without becomign engored, and your child can slowly wean. Keep the bedtime one until you are done. :)
If you have pumped milk saved, then go a head and give her that in a cup, otherwise I'd not give her cows milk yet. You can try almond milk for now, or pumped milk in a cup, but I'd hold off on giving her cows milk just yet.
And congratulations on nursing for a year, thats awesome!