Applesauce
Applesauce has long been used as a healthier alternative to oil in boxed cake mixes. According to I Forgot It's Wednesday, you may use a 1-to-1 ratio of applesauce to Greek yogurt. Because Greek yogurt is considerably more sour and thick than applesauce, it works best in recipes that call for a little amount of it. Applesauce is also considerably sweeter than Greek yogurt, so if you use more than a little amount of applesauce in your recipe, you may need to alter the extra sugar. If you are allergic to apples, purée alternative fruits such as pears for a comparable result.
Using applesauce instead of yogurt in baking has several advantages. According to Souper Sage, applesauce has less fat than Greek yogurt and is a lower-calorie alternative. However, because applesauce is considerably thinner than Greek yogurt, recipes that call for a fattier, creamier replacement should opt for plain yogurt, sour cream, or cottage cheese.