Put the Cheddar, flour, butter, salt, seasoned salt and cayenne in a food processor and pulse until the mixture resembles sand. Add the ice water and pulse until the dough comes together. Form the dough into a ball, wrap in plastic and refrigerate for 1 hour.
Preheat the oven to 175°C. Line a baking sheet with a silicone baking mat.
Roll out the dough to 1/4-inch thickness and cut into squares with a pizza cutter. Use a wooden skewer to poke a small hole in the center of each square. Transfer to the prepared baking sheet and bake until golden brown, 15 to 17 minutes. Allow to cool before packing up.
Recipe courtesy of Ree Drummond