If peanuts aren't already roasted, roast them at 375 for about 5-7 minutes, until some are golden. Let cool for about 10-15 minutes.

Put all of them in the food processor and add salt if desired.

Blend until you get a creamy consistency. This will take about 5-10 minutes. It should become a grainy texture at first, and eventually turn creamy.

Viola! Homemade zero-waste peanut butter! I hope you enjoy it as much as I do!