That's correct. They are separate mods and the recipe would have to be manually added to the recipes.xml for the Cooking Stations mod in the same format as the existing entries, at this time. In overhauls, such as The Wild West Mod, these mods are integrated and all possible recipes are added directly to all cooking stations.
In V1.0 they could be added as a conditional that would load them to the recipes only if the Cooking Stations mod was installed, but V1.0 is constantly updating and tweaking things during this transition period. V1.0 stable should soon be V1.1 stable. Once things are fully settled, it will be something worth exploring to integrate these mod features if they are loading together, even as individual mods.