There are 4 different sauces which can used for selling dishes, speeding their cooking time up or unspoiling them. You can either craft your own sauces with drops or buy them. Both of these actions can be done from the Sauces tab in your ingame menu.
Currently you can have 75 sauces of each type.
There are various drops for each sauce, and once you collect enough of them, you can craft sauces in the Sauces popup. Let's take a look at what they're used for:
1h Speed Sauce
Speeds up a dish's cooking time by 1 hour. You can tap on a dish cooking on the stove and use this sauce.
8h Speed Sauce
Speeds up s dish's cooking time by 8 hours. You can tap on a dish cooking on the stove and use this sauce.
Sells a dish from on top of a counter or a stove directly and lets you earn the total amount of coins you would have earned by selling the dish to customers. You can tap on dishes that are on the counters or the ones waiting on the stoves to use this sauce.
Spoil Saver Sauce
Instantly saves spoiled dishes. You can tap on a spoiled dish waiting on the stoves and use this sauce.
Don't be shy when using sauces as you can craft and earn many along the way!