Since peanut butter first hit the American market in the early 1900s, it has earned its reputation as an all-time favorite sandwich spread, touted for its economical and nutritional value. The United States is the world's largest peanut butter supplier and consumer, according to peanut-butter.org, growing several types of peanuts, each distinct in size, taste and use.

Peanuts belong to the legume family. Legumes are edible seeds enclosed in pods. This group provides the best source of concentrated protein in the plant kingdom. Types of peanuts include Virginias, Runners (including Florunners), Spanish and Valenica. Although any of these types of peanuts could be ground into a nut butter, florunners are most commonly found in the peanut butter jars on your grocers' shelves. The florunner variety was introduced in the 1970s and was responsible for an enormous increase in peanut yields, according to the American Peanut Council. The florunner is a variety of the Runner, having a medium-sized kernel and producing a consistently large yield. These characteristics caused it to become the dominant peanut type grown in the United States (80 percent), with 54 percent being used for peanut butter.

Spanish are small peanuts with reddish-brown skin that have a higher oil content and are processed for peanut oil and sometimes peanut butter. Valencia contain 3-4 small kernels in a long shell and are popularly sold roasted in the shell. Virginia peanuts have large kernels and are typically processed as cocktail nuts. All types of peanuts can be bought raw or roasted in bulk, so you can experiment with the different flavors and textures of the different varieties.

Homemade peanut butter offers a more natural and often tastier option than store-bought peanut butter. While peanut butter manufactured in the United States has to contain a minimum of 90% peanuts, most manufacturers add unnecessary amounts of salt, sweeteners, oils and preservatives. Natural peanut butter without any additions will have naturally separated oils, so it will need to be stirred before using and refrigerated.

Buy already roasted peanuts or roast them yourself in the oven. Shelled peanuts will require a shorter roasting time than those left in the shell. You may also opt to steam your peanuts for a milder taste. Process the shelled peanuts in a powerful blender or food processor. At first it will look loose and crumbly, but then it should begin to stick and turn into a thick paste as the peanuts' natural oil is released. Add peanut oil if the nut butter is too thick. Experiment with different sweeteners such as honey or molasses or add different types of nuts for a varied flavor. Create a unique peanut butter that caters to your taste and enjoy knowing exactly what went into it. Your peanut butter can be used in other culinary creations such as peanut butter cookies, Asian-style peanut sauces or peanut butter candy.