Florence Flower 3D Large Cake Lace Mat By Claire Bowman. The Florence Flower Cake Lace Mat can also be used as an impression mat. Cake Lace is so easy to use - simply make to the manufacturers instructions, spreading onto the mat and placing in the oven at 80°C. Bake for 12 to 15 minutes, take out of the oven and cool for five minutes; your Cake Lace is now ready to use!