First, follow the instructions on the packaging and observe your child’s reaction. If they get hungry quickly, it may mean you added too little; increase the amount next time. If they have dry stools in the morning, it may mean you added too much; decrease the amount next time. Mine is from Abbott, one scoop mixed with sixty milliliters. Perhaps different brands of formula milk have different preparation methods. I suggest buying a warmer; it’s very useful if you’re using powdered formula!