PREHEAT the oven to 400° F (200° C).
LIGHTLY SPRAY a baking sheet pan with non-stick cooking spray. (Alternatively, use parchment paper or a silicone baking sheet on the sheet pan).
MEASURE the pancake mix into a large bowl. Stir in the salt (optional).
CUT the butter into four pieces. Use a pastry cutter (or two kitchen knives) to cut (or rub) the butter into the dry mix. You are finished when the mix resembles wet sand, and the dough is slightly moist.
POUR the buttermilk into the dry ingredients. Stir with a wooden spoon. The batter will be lumpy at first. Continue to stir until the pancake mix is moist and a soft dough forms. If it is too dry, add up to 2 teaspoons more buttermilk. Resist the urge to make the batter wet.
LIGHTLY DUST a clean work surface with pancake mix powder. Dump the batter out.
FLATTEN the dough with your palms. When it is about 1-inch thick, fold it over once. Continue to pat the dough, flattening it again. Do not work dough too much, or the biscuits will be tough. (Alternately, roll the dough out with a floured rolling pin.)
CUT the biscuits with a biscuit cutter or the top of a drinking glass.
PUT the biscuits on the baking sheet. They can be close because they do not spread very much when baking.
CONTINUE to flatten the dough and cut the biscuits until the dough is gone.
PLACE the baking sheet in the preheated oven. Bake the biscuits for 10 to 12 minutes, or until they are a light golden brown.
REMOVE the buttermilk biscuits from the oven. Serve hot with butter and jam.
Note: If you do not have a biscuit cutter, divide the batter into equal piles of dough. Roll the dough between your hands and slightly flatten to make easy drop biscuits.
Cheesy Biscuits
FOLLOW steps 1 to 3 above.
STIR in oregano, garlic, black pepper and cheese.
FOLLOW steps 4 to 12 above.