Homemade Chocolate Bars: Chocolate Bars Made the Mexican Way http://www.chocolatecurb.com/homemade-chocolate... Credit goes to the Spanish nuns for the creation of an easier way to store and prepare chocolate. In the different convents, the nuns experimented with distinct formulas each one better than the previous one, thus perfecting the technique of toasting and grinding the cocoa beans. In many rural homes today, the tools for the preparation of the chocolate disks or bars are handed down from generation to generation. These consist of a flat, rectangular balsamic rock used as a grinding bed and a long, squared off rock used as a ��rolling pin�.