Mix the dry ingredients together in a large bowl
Add the Crisco and work it into the flour mixture very well. It should all buy disappear when you have it worked in enough
Make a well in the middle of the flour and add the milk to the bowl.
Work in flour from the sides until it is all fully combined.
Cover the bowl and set aside for about 20 minutes
Remove the dough ball to a clean counter. Add a little flour if needed to keep it from sticking to the
Knead the dough ball for about 2 minutes working back and forth with the heal of your hand to smash the dough ball.
Divide the dough ball in half with a knife and then each peice in half again until you have eight equal size pieces
Roll each piece into a tight ball and cover with a damp towel on your counter
Use a rolling pin and roll out a ball into a round shape until just over 1/8" thick (3mm)
Set on wax paper and repeat until all the chalupa shells are formed
Heat a large pot of oil or deep fryer to 350F (175c)
Fry each shell, starting with one side flat, floating on the oil. Cook for 15 seconds and flip over. Quickly fold the shell in half and fry each side, flipping back and forth until golden brown and a little crispy. Remove and let drain on a paper towel or cooling rack
Repeat until all shells are cooked. If any shells are not quite as cooked as you'd like you can recook them at this point.