Preheat oven to 350° Fahrenheit.
Add the all purpose gluten-free flour, shredded cheddar cheese, cold butter, and a pinch of salt to a food processor. Pulse until a dry and crumbly mixture comes together (it should resemble breadcrumbs).
Pour in 3 tablespoons of cold water, then pulse a few more times until the dough comes together in the ball. If the dough still seems too dry, add in the remaining 1-2 tablespoons of cold water.
Transfer the dough to a large sheet of parchment paper and place another sheet of parchment paper on top of the dough. Roll out the dough between the parchment paper until it’s about 1/8-inch thick.
Remove the top sheet of parchment paper and cut the dough into 1-inch crackers. Poke a small hole into the center of each cracker and sprinkled the crackers with crackers with flaky sea salt.
Then, transfer the dough (still on top of the parchment paper) to a large baking sheet and bake for 12-15 minutes, or until the crackers are lightly golden brown. Allow the crackers to cool completely before serving or storing.