Combine yeast, 2 tablespoons sugar, and warm water in a small bowl. Set aside for about 10 minutes or till bubbly.
In a large bowl, combine flour, 3 tablespoons sugar, baking powder, baking soda, and salt. Grate or cut in butter until crumbly.
Stir in yeast mixture and buttermilk just until ingredients hold together.
Roll or pat dough to 1" thick on a lightly floured surface. Cut out with a circle cookie cutter or the top of a glass.
Let biscuits sit while the oven preheats.
Place on cookie sheets and bake at 425° for about 15 minutes or until lightly browned. Brush with melted butter.
To freeze: After cutting biscuits into circles, place 1/2" inch apart on cookie sheets and freeze. After frozen place in heavy duty ziplock bags. Store for up to 2 months. To bake frozen biscuits, thaw completely on lightly greased cookie sheets, then bake at 425° for about 20-30 minutes.
Video
Notes
The size of biscuit cutter you use will determine the number of biscuits you get. I usually get about 2 dozen 2 1/2" biscuits. Smaller biscuits will take less time to cook.