Similar to workbenches and forges, the cauldron now requires specific structure upgrades in the vicinity to make the higher tier foods. For the Sausages, as mentioned, you need to make the spice rack. If you do not have that recipe in your build options using the hammer, then you still lack an ingredient. In this case, it’s likely turnips. You don’t need turnips to make sausages, but you do need turnips to make the cauldron upgrade that unlocks them. There’s three different upgrades total, each unlocking the next set of recipes.

You also can’t cook all meats on the standard cooking apparatus over a campfire anymore. There’s a new iron cooking station for the hefty meats like Serpent.