1.

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.

2.

Use a clean, dry knife to make straight cuts as shown in the photo (press, don't pull). Don't peel the door from the board yet. If you peel it of the board at this stage it will stretch and lose its shape.

3.

Soften (smooth) the edges gently with your finger.