Put the flour, rice flour and icing sugar into the processor and blitz. Add the butter in pieces and process until you have a crumbly mixture. Add the egg and rosewater and process until the dough begins to form a clumpThe dough will be very soft at this stage Tear off a piece of clingfilm large enough to wrap around half the dough. Remove half the dough and wrap in the clingfilm, pulling it together into a flattened ball. Repeat with the second piece of dough.
Refrigerate the dough for at least 20 minutes and
Set the oven to 180°C fan, gas mark 6
When the dough has chilled, take one piece out of the fridge
Cut another piece of clingfilm and lay it on your work surface. You are going to roll out the dough between the 2 pieces of clingfilm to avoid mess and using extra flour
Unwrap the dough and tip it onto the clingfilm. Spread the wrapping over the dough. Roll out the dough to a thickness of about ½cm
Cut out heart shapes with the cutterI make about 15 biscuits, but it will depend on the cutter size The dough can be re-formed into a ball and rolled out again as needed but as it warms up the dough gets soft, so it may need another 5 minutes in the fridge if you handle it a lot
Move each biscuit to the baking sheet. The mixture doesn't spread much so leave a small space between each
Bake for 10-12 minutesThe biscuits will still be pale on top, but light golden underneath. They will firm up as they cool Leave on the baking sheet for 10 minutes then transfer to a wire rack to cool
Repeat with the rest of the dough unless you are leaving it for later (see Note)