2-year-old refusing to eat yogurt?

It is perfectly normal! Toddlers often go through phases where they like one food for awhile then the next week they hate that same food and move on to something else. Try giving her 2 choices for each meal. For example you could ask her if she wants a scrambled egg and toast or yogurt and fruit for breakfast. This will make her feel like she is in control of what she eats and she will be more likely to eat. Just make sure that the choices you offer her are all healthy foods. You could also let her help you prepare her meals. If she helps it will make her feel like a big girl and she will want to eat what she helped make. For 1 month straight my niece would eat nothing but grilled cheese sandwiches and applesauce. The next month she would not touch either one and moved on to chicken and rice. She will grow out of being picky about food. For now just go with it and don't try to make her eat something she refuses. If you don't make a big deal out of it then neither will she and mealtimes will be much more pleasant.