Recipes, Ingredients, and Menus can all be bulk tagged from their respective catalog pages.
When on a catalog page, select the items that you would like to tag. Then, select the Bulk Tag icon that appears in the toolbar at the bottom of the screen.
Next, select the category name and category value that you would like to add to the selected items. Note that tags can also be removed in this way by toggling the switch from Add to Remove.