Sift cornflour, sugar and rice flour together in a medium-large bowl.
Add butter. Mix with hands until soft dough forms. If you feel that it's still too wet just add a little more flour (either one is fine). Refrigerate one hour.
Preheat oven to 150 C / Gas 2. Cover a baking tray with greased baking parchment. Shape dough into 2.5cm balls. Place about 5cm apart on greased parchment, then flatten with lightly floured fork. Bake for 20-25 minutes or until edges are lightly browned.
Really nice biscuits and a very forgiving recipe. I used a ready-made gluten free white flour mix (Dovedale), put it all in the food processor to mix and get the dough. Didn't bother chilling it and still got a great biscuit. Second time I made these and not the last! - 12 Jan 2012
Excellant recipe, just what I was looking for, the biscuit is not too sweet either which is nice. I didn't bother with the chilling part, it worked just as well. I rolled out the dough with plenty of rice flour as it was a bit sticky and I used a medium sized cutter to cut the rounds. You do have to persevere when doing the mixing part, but eventually the whole lot does hold together very well. - 18 Jan 2011