My macaroons were never perfectly regular. With these molds, I just put a little loose in the cells preparation and heat for 20 minutes at 50 °. The preparation is spread on its own and in a perfectly regular basis. Then mounted the oven for 20 minutes at 150 ° and voila. A great buy for calibrating and make regular macaroons. You can put two molds of this type on a standard baking tray.