The Mac Pie A La Mode is a MacDonalds apple pie (or other kind of pie like wildberry) and a McFlurry eaten together in harmony.

Step 1: Purchase 1 or 2 pies (2 pies if your going for the value menu) and a plain McFlurry (no condements like smarties).

Step 2: Depending on how you would like to enjoy your Mac Pie A La Mode, you can take a chunk of pie and scoop some ice cream or (as I like to do it) make a hole in the center of the McFlurry and insert the pie, and taking scoops of ice cream and pie at the same time.
*There are other variations of the Mac Pie A La Mode such as mixing the pie in with the ice cream.