Question: How many myths are there about the creation of the brownie?
About the article "Chocolate brownie", section "Myths about creation".

Candidate passages:
There are three main myths about the creation of the brownie.
The first, that a chef accidentally added melted chocolate to biscuit dough.
The second, a cook forgot to add flour to the batter.
And thirdly, the most popular belief, that a housewife did not have baking powder and improvised with this new treat.
It was said that she was baking for guests and decided to serve these flattened cakes to them.
All three myths have gained popularity throughout the years.
The Pangu myth appears to have been preceded in ancient Chinese literature by the existence of Shangdi or Taiyi.
Other Chinese myths, such as those of Nuwa and the Jade Emperor, try to explain how people were created and do not necessarily explain the creation of the world.
There are many variations of these myths. 
While in Bantu mythology the universe and the animals are eternal, so that there are no creation myths about their origin, the opposite holds for mankind.
In many Bantu myths, the first man was born from a plant: for example, he came from a bamboo stem in Zulu, and from a "Omumborombonga" tree in Herero mythology.
Other traditions have the first men come out of a cave or a hole in the ground.
People that mainly live on cattle farming usually believe that men and cattle appeared on earth together.
It can be noted that, as is the case with many mythologies, Bantu mythologies about the creation of man are often limited to describing the origin of certain human groups, rather than all of humanity.
For example, most Bantu peoples that coexist with bushmen do not include these in their creation myths (i.e., bushmen are considered a part of the eternal universe rather than a part of mankind). 
Agriculture is an important theme in Chinese mythology.
There are many myths about the invention of agriculture that have been told or written about in China (Yang 2005:70).
Chinese mythology refers to those myths found in the historical geographic area of China.
This includes myths in Chinese and other languages, as transmitted by Han Chinese as well as other ethnic groups (of which fifty-six are officially recognized by current administration of China).
(Yang 2005:4) Many of the myths about agriculture involve its invention by such deities or culture heroes such as Shennong, Houji, Hou Tu, and Shujun: of these Shennong is the most famous, according to Lihui Yang (2005:70).
There are also many other myths.
Myths related to agriculture include how humans learned the use of fire, cooking, animal husbandry and the use of draft animals, inventions of various agricultural tools and implements, the domestication of various species of plants such as ginger and radishes, the evaluation and uses of various types of soil, irrigation by digging wells, and the invention of farmers markets.
Other myths include events which made agriculture possible by destroying an excessive number of suns in the sky or ending the Great Flood. 
Nature of myths.
The main characters in myths are usually gods, supernatural heroes and humans.
As stories, myths are often endorsed by rulers and priests and closely linked to religion or spirituality.
In the society in which it is told, a myth is usually regarded as a true account of the remote past.
In fact, many societies have two categories of traditional narrative, "true stories" or myths, and "false stories" or fables.
Creation myths generally take place in a primordial age, when the world had not yet achieved its current form, and explain how the world gained its current form and how customs, institutions and taboos were established.