This paper is on the design of automated peanut butter making machine for a developing economy which targets small scale farmers. Many developing countries are still using traditional methods in making peanut butter for example pestle and motor while others are using hand operated machines which are laborious and slow. The demand of peanut butter is increasing but machines are manually and expensive therefore the production rate of peanut butter is low in developing economy. If peanut butter peanut is taken in small proportions chances of chronic diseases are reduced and also due to high proportion of carbohydrates in peanut butter there is gain in weight. There are three types of forces when crushing solid food namely shear, impact and compression. Rittinger, Kick and Bond laws are used to determine amount of energy needed in size reduction of solid food. . After careful analysis of current peanut butter making machines and thorough study, a solution was developed that is efficient, safe and affordable The machine grind 50-56kg per hour with minimum human involvement since the machine automatically stop if all peanuts in the hopper get exhausted. Power required to grind peanuts is approximately 1.01kW.