This is what the SW website says
Over the past few weeks lots of you have been in touch about making recipes like couscous cake, smash pizza, cottage cheese scones, lasagne crisps and many others. We’ve popped together a feature online called ‘myths and misconceptions busted’ where we uncover the truths about these ‘tweaks’ to protect your weight losses!
Are cous cous cake, smash pizzas and lasagne sheet doritos free?
You might be disappointed to hear that they’re not. Because changing the use of a food can make it easier to over-eat, to protect your weight loss they become Synned.
When foods like pasta, rice and grains are used in their original form they’re low in energy density (calories), bulky, appetite-satisfying foods. Pasta, couscous and rice are usually the main ingredient in a meal packed with other Free Foods – giving it sufficient bulk to be satisfying as a meal in itself. However, when ground down, used as flour (like in couscous cake), used as a sauce thickener (like Smash), seasoned crisps (like Doritos) or puréed (like smoothies) they’re often used as additions to a main meal… and on top of your day’s Syns. It is a very effective way of adding a lot of extra calories in a non-bulky way, and as such would then be counted as Syns
It also says in the food optimising book that free foods used as substitute for flour should be synned
