The night before you want to make these, feed your sourdough starter so it's nice and bubbly in the morning. You will need 2 cups of starter so feed accordingly so you have some leftover.
Preheat oven to 450 degrees F. Line a cookie sheet with parchment paper or a baking mat.
Combine the flour, baking powder, and salt in a large mixing bowl and mix well.
Using a cheese grater, grate the stick of butter into the flour mixture and mix well until crumbly.
Add the honey, sourdough starter, and buttermilk to the bowl. Mix well until the dough comes together.
Pour dough out onto a floured work surface. Using your hand or a rolling pin, flatten the dough to about 1 inch in thickness.
Use a biscuit cutter or glass jar to cut out the biscuits. Place on the cookie sheet 1 inch apart.
Bake for about 12 minutes, or until lightly browned.