Batch-bake refers to the process of baking a large quantity of food items at the same time. There are several synonyms for batch-bake that can be used to add variety to your recipe instructions. "Bulk-bake" is one option that falls in the same category, as it suggests baking multiple servings in one go. Other similar terms include "mass-bake" and "volume-bake". "Multiple-bake" is another useful synonym that can be used to express the need to bake several batches of food items. You can also try using "multi-bake" or "consecutive-bake" to describe the same process in a different way.