How to mix powdered formula with Milk

Hello Mommas !! I have this huge doubt since very long. I have a premie baby and she is one year old now. Her corrected age is 11 1/2 months old. I started giving her cow’s milk with her pediatrician consultation. I wanna know if I can mix ENFAMIL PREMIUM TODDLER TRANSITION POWDER to COW’s MILK. Please let me know in the comments. Also mention the measurements. Thank You !!