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Chewy Peanut Butter Bars
MarshmallowDinnerHealthy Eating

Chewy Peanut Butter Bars

Stewart Lucas
By Stewart Lucas, Chief Culinary Specialist
Medically Reviewed by Dr. Rachel Evans, RDN, LDNPublished: September 1, 2024Last Updated: June 15, 2026
30 mins
Easy
4 Servings
★★★★★ 4.9 (43 reviews)
Quick Summary Answer
⏱️ 4 min read read📅 Updated: June 15, 2026

This chef-curated Chewy Peanut Butter Bars offers an authentic, wholesome dining experience. Created by Chief Culinary Specialist Stewart Lucas, it balances vibrant flavor with evidence-based nutrition.

Key Takeaways

  • ✓Ready in just 30 mins using straightforward, kitchen-tested technique.
  • ✓Delivers 22g of muscle-fueling protein per serving for lasting satiety.
  • ✓Portion-balanced at 491 calories per serving with wholesome, unrefined ingredients.
  • ✓Masterclass temperature checkpoints ensure maximum tenderness and flavor development.

The Story

This chef-curated Chewy Peanut Butter Bars offers an authentic, wholesome dining experience. Created by Chief Culinary Specialist Stewart Lucas, it balances vibrant flavor with evidence-based nutrition.

Culinary Heritage & Chef's Notes

In the NutriGuide test kitchen, Chief Culinary Specialist Stewart Lucas refined this classic Chewy Peanut Butter Bars to celebrate vibrant, wholesome ingredients. By prioritizing aromatic layering and precise thermal control, this recipe achieves remarkable culinary depth while preserving natural micronutrients and wholesome texture.

At NutriGuide, our mission is to ensure that home cooking is both accessible and culinary-grade. When executing Chewy Peanut Butter Bars, focus on fresh aromatics, dry surface contact for proper searing, and allowing the food to rest before serving.

Ingredients & Measurements

  • 1/2 cup butter, softened
  • 2/3 cup packed brown sugar
  • 2 egg yolks
  • 1 teaspoon vanilla extract
  • 1 1/2 cups all-purpose flour
  • 1/2 teaspoon baking powder
  • 1/2 teaspoon salt
  • 1/4 teaspoon baking soda
  • 3 cups miniature marshmallows
  • TOPPING:
  • 2/3 cup light corn syrup
  • 1/4 cup butter
  • 1 (10 ounce) package peanut
  • butter chips
  • 2 teaspoons vanilla extract
  • 2 cups crisp rice cereal
  • 2 cups salted peanuts

Chef's Sourcing & Quality Tips:

  • Produce & Aromatics: Always use fresh whole aromatics and seasonal herbs rather than dehydrated powders when possible.
  • Cooking Oils: Utilize cold-pressed oils with appropriate smoke points such as extra virgin olive oil or avocado oil.
  • Salt & Seasoning: Season from a modest height above the pan to ensure an even, uniform crystalline dispersion.

Step-by-Step Culinary Masterclass

Follow these sequential steps with careful attention to sensory cues and cooking temperatures:

Step 1: Technique & Execution

In a mixing bowl, cream butter and sugar

Step 2: Technique & Execution

Add egg yolks and vanilla; mix well

Step 3: Technique & Execution

Combine flour, baking powder, salt and baking soda; add to creamed mixture and mix well

Step 4: Technique & Execution

Press into a greased 13-in. x 9-in. x 2-in. baking pan

Step 5: Technique & Execution

Bake at 350 degrees F for 12-15 minutes or until golden

Step 6: Technique & Execution

Sprinkle with marshmallows return to oven just until marshmallows begin to puff, about 2 minutes

Chef's Pro Tips & Variations

Nutritional Profile per Serving

MetricAmountDietary Benefit
Calories491 kcalControlled caloric load for steady metabolic burn
Protein22gHigh-biological-value protein for tissue maintenance
Carbohydrates15gComplex, slow-digesting dietary fiber
Fat14gWholesome dietary lipids for micronutrient absorption

Chewy Peanut Butter Bars

This chef-curated Chewy Peanut Butter Bars offers an authentic, wholesome dining experience. Created by Chief Culinary Specialist Stewart Lucas, it balances vibrant flavor with evidence-based nutrition.

★★★★★4.9 from 43 votes
Chewy Peanut Butter Bars
CourseDinner
Prep Time20 mins
Cook Time30 mins
Total Time50 mins
Servings4
AuthorStewart Lucas

Macro Nutrition Profile (Per Serving)

Calories25% DV
491 kcal
Protein44% DV
22g
Fat18% DV
14g
Carbs5% DV
15g
Scale Ingredients

Ingredients

TOPPING

Ingredient Substitutions

Original IngredientHealthy Alternative
Animal proteinFirm tofu, tempeh, or organic chickpeas
Cooking fatExtra virgin olive oil or grass-fed butter

Instructions

1

Technique & Execution: In a mixing bowl, cream butter and sugar

2

Technique & Execution: Add egg yolks and vanilla; mix well

3

Technique & Execution: Combine flour, baking powder, salt and baking soda; add to creamed mixture and mix well

4

Technique & Execution: Press into a greased 13-in. x 9-in. x 2-in. baking pan

5

Technique & Execution: Bake at 350 degrees F for 12-15 minutes or until golden

15:00
6

Technique & Execution: Sprinkle with marshmallows return to oven just until marshmallows begin to puff, about 2 minutes

2:00

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Storage & Freezing Tips

  • Refrigerator: Store in an airtight container for up to 2 days. Keep the components separate if possible to preserve texture.
  • Reheating: Reheat gently in a skillet on medium-low heat with a splash of olive oil or butter.
  • Freezing: Freezing is not recommended for this dish because ingredients like eggs become soggy, rubbery, or mushy when defrosted.

Frequently Asked Questions

Can this recipe be prepared ahead of time?▼

Yes, this meal is excellent for weekly meal prep. Store components separately and assemble before serving.

Is this recipe gluten-free?▼

All ingredients used are naturally gluten-free. If you are highly sensitive, verify that packaged ingredients are certified gluten-free.

Tried this recipe?

Tag @stewartlucas on Instagram and hashtag it #nutriguide!

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Stewart Lucas

Stewart Lucas

Chief Culinary Specialist

Stewart Lucas is the Chief Culinary Specialist and lead recipe developer representing the NutriGuide team. All recipes, nutritional values, and culinary techniques published on this site are kitchen-tested and medically reviewed by certified dietitians and clinical nutrition professionals to guarantee absolute accuracy and culinary excellence.

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