This mod makes recipes using stacked ingredients to produce stacked output. The reason for this mod is I have found some mod packs can end up with major speed boost that even loaders are unable to provide the resources fast enough
Some mods don't use icons, and this mod breaks when you have recipes with no icons.
Two examples I can think of are Leighzer's Morphite, and Spidertron Patrols.
The wiki says they are not required for recipes for more than one product, and if there is not a main_product. The fallback is the product/main_product.
Recipes need an icon if the recipe has more than 1 product, and main_product is set to an empty string.
In this case it will use the name, description and icon from the recipe instead of the item.