Make a door template or use the template attached to this tutorial (adjust the size to the size of the cake). Roll the brown flower paste out. I used 1.5 mm spacers (wooden lollipop sticks). I suggest not using corn flour or icing sugar underneath - you want the paste to cling slightly to the board, so that it won't move while cutting. Place the template on the rolled out paste. Use a wheel tool to make the curved cuts.