No-Bake Peanut Butter Chocolate Oat Bars

Presto Peanut Bars
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.
Prep Time 10 minutes
Cook Time 4 minutes
Cooling Time 1 hour
Total Time 1 hour 14 minutes
Course Snack
Cuisine American
Servings 45 bars
Calories 72 kcal

Ingredients
  

  • ½ cup pet (evaporated milk)
  • 2 cups sugar
  • ¼ cup cocoa
  • ½ cup margarine
  • ½ cup peanut butter
  • 1 tsp vanilla extract
  • ½ cup chopped nuts (optional)
  • 3 cups quick oats

Instructions
 

Step 1: Boil Base

  • In a saucepan, combine pet milk, sugar, cocoa, and margarine.
  • Bring to a boil and cook for 2 minutes, stirring constantly.

Step 2: Mix Add-Ins

  • Remove from heat.
  • Stir in peanut butter, vanilla extract, and chopped nuts.

Step 3: Add Oats

  • Mix in quick oats until well combined.

Step 4: Form Bars

  • Drop mixture by spoonfuls onto wax paper or wafers.
  • Let cool until firm, about 1 hour.

Tips

  • Add ½ cup shredded coconut for extra texture.
  • Stir in mini chocolate chips after cooling slightly to prevent melting.
  • Use chunky peanut butter for more crunch.
  • Replace margarine with butter for richer flavor.
  • Add a pinch of salt if using unsalted peanut butter.
  • Press mixture into a pan rather than dropping by spoonfuls for uniform bars.
  • Add ¼ cup chopped nuts (pecans or walnuts) for added crunch.
  • Substitute almond butter if you prefer a different flavor.
  • Drizzle melted chocolate over the top for a more decadent finish.

Nutrition

Calories: 72kcalCarbohydrates: 10gProtein: 1.5gFat: 3gSaturated Fat: 1gPolyunsaturated Fat: 0.7gMonounsaturated Fat: 1.1gSodium: 22mgPotassium: 55mgFiber: 0.8gSugar: 7gVitamin A: 90IUCalcium: 6mgIron: 0.3mg
Keyword classic american sweets, cocoa, heirloom recipe, no bake dessert, no-bake, peanut butter, peanut butter bars, quick treat, quick treat vanilla, stove-top candy, vintage recipe
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