A custard pie is an uncooked custard mixture added to an uncooked or partially cooked crust and baked together. THIS POST MAY CONTAIN AFFILIATE LINKS. July 8, 2018 by Beth Pierce 112 Comments. PLEASE SEE MY FULL DISCLOSURE POLICY FOR DETAILS. Try this amazingly delicious Thick Custard I am sure you will always tempt to prepare this for every party! AS AN AMAZON ASSOCIATE I EARN FROM QUALIFYING PURCHASES. Old Fashioned Silky Creamy Custard Pie. Here in the US, a custard pie typically has a mixture of milk, eggs, sugar, salt, vanilla extract and nutmeg combined with a pie crust. On two of these occasion when I was baking my custard pie a funny thing happened. When time is limited and I want a homemade pie, custard pie is the thing to bake. I can bake a fully homemade custard pie in less than 23 minutes, the crust and filling. Custard Pie Story. Thick Custard is simply irresistible. Most of the time we all have the ingredients for custard, eggs and milk.