Make sure the parchment paper comes up about 3 cm over the top edge of the tins. (bakingmad.com)
When cold, run a sharp knife around the edge of the tin to release the cake (if it doesn't fall out in its own), open the spring, invert and remove the border of the cake tin. (glutenfreealchemist.com)
Fill the tins one - third full, then drop in an amaretti biscuit and top up with mix, leaving a 1 cm gap between the top of the mix and the edge of the tins. (bbcgoodfood.com)