Recipe is Slightly modified from KitchenAid Pasta Attachment Manual. Place eggs, water, flour and salt in mixer bowl. Attached bowl and flat beater. Turn to speed 2 and mix for 30 to 60 seconds. Add more water if the dough is too dry, in 1/2 Tablespoon increments. Change out the flat beater for the dough hook.
It can be hard to find the right recipe for pasta extruder dough, but this tested one will make great extruded spaghetti, macaroni, and more with the KitchenAid extruder attachment. Weigh the flours separately using a kitchen scale for accuracy. Pour the flours into the bowl of a stand mixer. Use the dough hook attachment to combine for a minute.
Anyone with a KitchenAid pasta extruder attachment will tell you the same thing — the KitchenAid pasta dough recipe to use in the extruder sucks. I tried it myself and after the first big failure with the machine, I didn't play with it for awhile.
Directions: Place eggs, water, flour and salt in mixer bowl. Attached bowl and flat beater. Change out the flat beater for the dough hook. Turn to speed 2 and knead for 2 minutes. Cut dough into four pieces before processing with pasta sheet attachment. Take one piece and flatten into a rectangular shape.