Preheat oven to 450°F. Line cookie sheet with parchment paper.
Mix dry ingredients. Cut cold butter into dry ingredients and mix, so the butter is no bigger than pea-sized. Stir in milk all at once, until wet. Drop spoonfulls onto cookie sheet, about 1 inch apart.
Bake until done, about 15 minutes. Take out of oven and put biscuits on a plate to cool.
Makes enough for 2 people. Quick and easy. It can be easily multiplied to serve an arbitrary amount of people.
I move the biscuits from the cookie sheet to the plate by hand. They're rather hot, and the sheet is quite hot, so if you don't want to burn yourself you may want to use a spatula.
That's the normal amount of butter I use, though I vary it between no butter and 2 tablespoons.
A tasty variant uses 2 tablespoons butter, 2 ounces of honey, and 1/3 cup milk. If you do use honey, watch the cooking time because it has a tendency to burn.