Presto Peanut Bars are a classic no-bake treat, often whipped up quickly for school lunches, bake sales, or family gatherings. Popularized in mid-century kitchens for their speed and simplicity, these bars combine pantry staples like cocoa, oats, and peanut butter into chewy, chocolatey morsels. They're a nostalgic dessert that continues to please today, thanks to their ease of preparation and rich flavor.