For a richer flavor, use brown butter in the base and frosting. Simply melt the butter until it browns and has a nutty aroma, then let it cool slightly before using. Store the peanut butter bars in an airtight container at room temperature for up to 3 days or in the refrigerator for up to 1 week.
Retro School Cafeteria Peanut Butter Bars
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PREP TIME15 mins
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COOK TIME20 mins
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TOTAL TIME1 hrs 5 mins
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SERVING20 People
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VIEWS18
Relive the nostalgic flavors of your childhood with these irresistible peanut butter bars, reminiscent of the classic school cafeteria treat. A symphony of peanut butter, oats, and a creamy frosting, these bars are pure comfort in every bite.
Ingridients
Adjust Servings
Nutrition
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Carbohydrate52 g
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Cholesterol49 mg
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Fiber2 g
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Protein6 g
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Saturated Fat9 g
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Sodium136 mg
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Sugar37 g
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Fat18 g
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Unsaturated Fat0 g
Follow The Directions
01
Step
5 mins
Preheat oven to 350°F (175°C). Grease a 15x10-inch baking pan. (5 minutes)
02
Step
7 mins
In a large mixing bowl, cream together granulated sugar, brown sugar, and softened butter until light and fluffy. Beat in eggs one at a time, then stir in 3/4 cup peanut butter and 1 teaspoon vanilla extract. (7 minutes)
03
Step
5 mins
In a separate bowl, whisk together flour, oats, baking soda, and salt. Gradually add the dry ingredients to the wet ingredients, mixing until just combined. (5 minutes)
04
Step
2 mins
Spread the batter evenly into the prepared baking pan. (2 minutes)
05
Step
25 mins
Bake in the preheated oven for 20-25 minutes, or until golden brown and the edges start to pull away from the sides of the pan. (25 minutes)
06
Step
30 mins
Remove from the oven and let cool completely in the pan, or chill in the refrigerator for faster cooling. (30 minutes)
07
Step
8 mins
While the bars are cooling, prepare the frosting: In a medium bowl, beat together powdered sugar, 4 tablespoons softened butter, 2 tablespoons milk, 2 tablespoons peanut butter, and 1 teaspoon vanilla extract until smooth and creamy. Add more milk, 1 teaspoon at a time, until desired consistency is reached. (8 minutes)
08
Step
3 mins
Once the bars are completely cooled, spread the frosting evenly over the top. (3 minutes)
09
Step
2 mins
Cut into 20 bars and serve. (2 minutes)
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RECIPE REVIEWS
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Please Rate
Webster Kuhic
Jun 23, 2025The frosting is so creamy and perfect. I will definitely be making these again.
Hortense Torphy
Jun 14, 2025These bars are amazing! They taste exactly like the ones I remember from school.
Valentin Mccullough
Jun 1, 2025I added a pinch of cinnamon to the oat mixture and it gave them a wonderful warmth.
Caleb Lesch
May 20, 2025I made these for a bake sale and they were gone in minutes! Everyone loved them.