My grandmother has been making biscuits for a long time and they are always perfect. Here's how she does it.
Mix together shortening and flour. Mix until pieces of shortening are the size of a pea.
She adds a pinch of baking soda just to kill the flavor of the buttermilk
Grease the pan with a little bit of canola oil. Spread it around the pan so that it's evenly distributed.
Make a bed of flour
Add more buttermilk as needed
It should look like this
Put wet dough onto bed of flour
Kneed the dough until it is easily handled
Spread out the dough about half an inch
Cut out the biscuits using the biscuit cutter
Use all the available dough you can. Consolidate scraps of dough and use them to make more biscuits
Spread some of the oil onto the top of the biscuit like this.
Don't crowd the Biscuits too much unless you have to.
My grandmother heats the oven to 435 but the standard is 450 or even 500. I think this mostly depends on the oven. Find out what works for you!
Put the biscuits in the oven on the top rack
Rotate the pan as needed. This takes practice and experience.
Take them out when they are golden brown. Serve while hot, but these are great cold
I hope you enjoyed this guide. Happy Mother's Day!