Preheat oven to 425°F. Grease a cast iron skillet or 9" round baking pan. I use the vegetable shortening to grease the pan.
Sift salt and flour together in a large glass bowl using a hand sifter.
Add butter and lard. Cut into flour until it has pea-size pieces or smaller. I use a pastry cutter for this.
Using a wooden spoon slowly stir in buttermilk starting with one cup. The amount you add will vary.
Keep adding buttermilk until dough is slightly moist. You don't want it too wet and sticky or too dry and crumbly. DON'T OVER STIR.
Put dough on a flat surface and from it into a ball, just brining it together. You may have to slightly knead the dough but be very careful not to over work it.
Using a rolling pin, roll the dough a couple of times until it is about 3/4" to 1" thick.
Cut dough using a biscuit cutter or the rim of a glass.
Place biscuits into pan so that they are slightly touching or "kissing" one another. this helps the biscuits to rise.
Brush the tops with melted butter or excess buttermilk and bake in oven until they are golden on top. This is usually around 25 minutes