You really won't need the toddler milk! Swap it gradually so she gets used to the taste, swap 1oz at a time, so if she has 8oz bottle put 7oz of formula and 1oz of cow's milk, next day or the day after make it 6oz of formula and 2oz of cow's milk. Keep going like this until you have just cow's milk in the bottle. As the bottle gets to be more cow's milk than formula you may need to go more slowly, you can try different temps too, some don't like their cow's milk warmed, some like it warmer!
As she is 1, I will move this over to eating for toddlers too!
Laura