Updated: 5/27/2012
Appliances:
Max: 18 slots at lv 73. 24G to unlock extra.
In Restaurant Story, you start with 2 free appliance slots. You unlock the third at level 5 and then every fifth and fourth level, alternating. At level 73, you will open up the 18th slot, which is max number of appliance slots you get for free. It costs 24 Gem each to have extra slots, which can be purchased at any level. Purchasing extra slot means you'll have x number more at that level than those who don't. For more information about the max number of free slots for each level, check out the Leveling page.
To switch appliances, go to the Build menu, tap on an appliance, and store it.
Don't bother selling appliances; you get 1/10 the gold back and none of the parts if it was a constructable/construbible.
Retired recipes can no longer be cooked. Also available on iOS only, goal recipes remain locked if not unlocked during the time they were goal rewards; no announcement from TeamLava if and when they will be removed.
Use Control + F to search for recipes.
Current appliances and recipes (and cooking time):
Current constructable/constructible (check out the constructable/constructible section for more information):
Some appliances have been retired. You cannot purchase any new ones (but you can finish constructing them if you bought them before they were removed) and cook on them if you already have some out or in storage.
Retired constructables/constructibles: