Some readers have used non-dairy butter or margarine but a lesser amount, about ½ cup. For the egg-free version, you can use two flax gel eggs. If your batter mixture for the crust is too thick to pour over/spread on top of the filling, add dairy-free milk until it is. You don’t want more liquid than necessary so start with ¼ cup of dairy-free milk, but add up to ½ cup if needed.