I want to share with you my list of Substitutes. I keep this posted to my kitchen cabinet door.
1/4 cup applesauce or 1 whole banana= 1 egg (for sweet baking)
2 TBsp water+1 TBsp oil+2 tsp baking powder= 1 egg
1 TBsp ground/milled flax seed simmered in 3 TBsp water= 1 egg
2 TBsp water+ 2 tsp baking powder= 1 egg
1/4 cup tofu= 1 egg
2 TBsp cornstarch= 1 egg
1 cup milk+1 TBsp vinegar or lemon juice= 1 Cup buttermilk
3/4 cup milk+ 3 TBsp butter= 1 Cup light cream (in baking)
2/3 cup dry milk + 1 cup water= Homemade evaporated milk
1 cup milk+1 TBsp melted butter= Half & Half
This list has been extremely helpful over the years, hope you enjoy!