In the bowl of a food processor, combine the flour, salt, baking powder and cayenne pepper. Add the butter and process until the mixture is well combined, then transfer to a large mixing bowl. Add the cheddar cheese and sage and stir to combine. Stir in 1 tablespoon water then gather the dough into 3 or 4 balls, flatten to disks and wrap in plastic. Chill for 30 minutes.
Preheat the oven to 400 degrees F. On a floured surface, roll the chilled dough out to ¼" thick, then cut using a 1½" round biscuit cutter (or small cookie cutter of your choice) and place on an ungreased cookie sheet. Bake for 10 minutes and allow to cool. Store in an airtight container until ready to serve. (Dough can be made ahead, wrapped tightly and frozen up to 5 days in advance. Crisps can be baked up to 2 days in advance and stored in an airtight container.)
Recipe by Culinary Thymes at https://www.culinarythymes.com/a-little-bite-before-the-feast/