Chocolate

Chocolate can be randomly obtained from zombies in Adventure Mode, Mini-games, Puzzle Mode, and Survival Mode, making the same sound effect as a Diamond and a Present. Its sugary goodness causes Stinky the Snail to move faster and stay awake for an hour.

Usage
Chocolate can also be used on plants, causing them to drop coins more quickly. When dropped on plants, it lasts 5 minutes (PC) and produce coins faster, from one every sixty to seventy seconds down to 4 every 60-70 seconds. Their animation is roughly double speed (each plant has a different rate, your values might vary).

The player can have up to 10 pieces of Chocolate at once; when the limit is reached zombies stop dropping them. It is possible for a player to have more than 10 chocolates at once; if they already have 9 chocolates, and an Instant kill is used, the killed zombies may drop 2 or more chocolates.

Note: Chocolate will not drop until you purchase Stinky the Snail.

Note: If a plant is not glowing or full-sized, you cannot use Chocolate on it.

If you have the maximum number of Chocolate (10 pieces), the drop rate of Zen Garden plants increases slightly since no more Chocolate may drop instead.

Trivia

 * When you feed Stinky the Snail with chocolate, a siren will be heard. It is also heard when you feed a Hypno-shroom to a Zombie.
 * Chocolate is surprisingly not available in the Zen Garden part of Crazy Dave's Twiddydinkies, even if it is a necessity, especially when you have a lot of Zen Garden plants. This may be due to it being more useful.42_Chocolates.png
 * When a Chocolate is dropped in a level, it makes the same sound as Diamonds and Presents.
 * There is possibly a glitch where you can have 11 Chocolates. (See picture above).
 * It is actually possible to get up to 42 Chocolates in the GOTY Version (for more information, see this blog).
 * You can feed the Zen Garden plants Chocolate if they are happy, and they will start moving quickly and producing money quickly.
 * However, the plants still move normally in the DS version.
 * Chocolate, Bacon and the Magic Taco are the only food in this game which are not plants.