Cut the shortening into the flour using a blending knife or stand mixer on low till flour looks like wet sand. Don't blend all butter chunks in, leave a few nice sized chunks.
2/3 cup shortening
Pour buttermilk into the bowl and gently stir in by hand.
1-1/2 cup buttermilk
Flour your work surface and scoop the biscuit dough onto it. Gently fold over your dough using floured hands to create layers. Flour your biscuit cutter and cut biscuits. DO NOT ROTATE CUTTER. Cut straight down and then up. Place cut biscuits onto baking sheet or cast iron skillet.
Bake in very hot oven 8-10 minutes till tops are lightly tanned.
Notes
You can substitute regular milk for the buttermilk. Add it slowly since you will use less than the recipe calls for.