How does the description of making hot chocolate add to our understanding of the novel? pg 178

"The amount of water used should be a little more than enough to fill the cups.When the water comes to a boil for the first time,remove it from the heat,and dissolve the chocolate completely;beat with a chocolate-mill until it is smoothly blended with the water. Return the pan to the stove. When it comes to a boil again and starts to boil over, remove it from the heat.Put it back on the heat and bring it to a boil the third time. Remove from the heat and beat the chocolate.Pour halff into a little pitcher and beat the rest of it some more.Then serve it all,leaving the top covered with foam." ( pg 178)