These are great to send abroad to sailors on deployment.
Here are acouple of Links for receipeis and instructions:
Tip: Pie in a jar I bake my crust a few minutes before adding the filling just to firm it up and start the baking proceess for a more crisp crust.
Before baking make sure jar rims are wiped clean for sealing lids when they are done baking.
AS Soon as I took them from the oven I put the canning lid/rings on to seal them..carefully wiped the edges so I could get the ring on, let them cool. They sealed up nicely. checked the lid to make sure there was not movement the next day. wrapped them in bubble wrap, placed them in the center of a box added other edibles to pad them & to keep them from shifting in the box and took them to the post office.
Cake in a jar website: http://allrecipes.com/Recipe/Cake-in-a-Jar/Detail.aspx
all the directons are on this webiste...very popular..
VERY IMPORTANT key is to have clean jar rims before baking...so wipe off any cake batter that may have gotten on the jar rim so lids will seal. Put lids and rings on jars as soon as they come out of the oven. The heat is what "seals" the lids on.