Ultimate Peanut Butter Blondies with Frosting & Ganache

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Introduction: The Ultimate Peanut Butter Dessert Experience

Are you ready to take your blondies to the next level? Imagine sinking your teeth into a chewy, brown butter blondie, stuffed with peanut butter cups, topped with velvety peanut butter frosting, and drizzled with a luscious semi-sweet chocolate ganache. This isn’t just a dessert—it’s a decadent masterpiece that combines the best textures and flavors in every bite.

Whether you’re a peanut butter lover, a chocolate enthusiast, or just someone who appreciates a show-stopping dessert, this recipe is for you. Below, we’ll break down every step—from perfecting the blondie base to crafting the smoothest ganache—so you can recreate this indulgent treat at home.

📌 Pro Tip: For the best results, use high-quality ingredients like real brown butter and semi-sweet chocolate—they make all the difference!

Table of Contents

  1. Ingredients You’ll Need
  2. Step-by-Step Instructions
  3. Peanut Butter Cup Blondies: Tips & Science
  4. Peanut Butter Frosting: Creamy Perfection
  5. Chocolate Ganache: Rich & Glossy
  6. Baking Tips & Common Mistakes
  7. Serving & Storage Suggestions
  8. Nutritional Information
  9. FAQs

1. Ingredients You’ll Need {#ingredients}

Here’s everything you need to make these peanut butter cup stuffed blondies with peanut butter frosting and chocolate ganache:

For the Blondies:

  • 1 cup (226g) unsalted butter, browned and cooled (key for deep flavor!)
  • 1 ½ cups (300g) light brown sugar (packed for chewiness)
  • 2 large eggs + 1 egg yolk (for richness)
  • 2 tsp vanilla extract
  • 2 cups (250g) all-purpose flour
  • 1 tsp baking powder
  • ½ tsp salt
  • 10-12 mini peanut butter cups (or chopped full-size cups)

For the Peanut Butter Frosting:

  • ½ cup (113g) unsalted butter, softened
  • ½ cup (125g) creamy peanut butter
  • 1 ½ cups (180g) powdered sugar
  • 1-2 tbsp milk (as needed for consistency)
  • ½ tsp vanilla extract
  • Pinch of salt

For the Chocolate Ganache:

  • ½ cup (90g) semi-sweet chocolate chips (or chopped chocolate bar)
  • ¼ cup (60ml) heavy cream

📌 Substitutions:

  • Gluten-free? Use a 1:1 GF flour blend.
  • Dairy-free? Swap butter for coconut oil and use dairy-free chocolate.

2. Step-by-Step Instructions {#instructions}

Step 1: Brown the Butter

  1. Melt butter in a saucepan over medium heat, stirring until it turns golden brown and smells nutty.
  2. Let it cool slightly before mixing.

Step 2: Make the Blondie Batter

  1. Whisk brown sugar into the brown butter, then add eggs and vanilla.
  2. Fold in flour, baking powder, and salt until just combined.
  3. Press half the batter into a lined 9×9 pan, then place peanut butter cups in rows.
  4. Cover with the remaining batter.

Step 3: Bake & Cool

  • Bake at 350°F (175°C) for 25-30 minutes until edges are golden.
  • Let cool completely before frosting.

Step 4: Prepare the Frosting & Ganache

  1. Frosting: Beat butter, peanut butter, powdered sugar, and vanilla until fluffy.
  2. Ganache: Heat cream until steaming, pour over chocolate, let sit, then stir until smooth.

Step 5: Assemble & Serve

  • Spread frosting over cooled blondies, then drizzle with ganache.
  • Slice and enjoy!

3. Peanut Butter Cup Blondies: Tips & Science {#blondies}

✅ Why Brown Butter? It adds a nutty depth that pairs perfectly with peanut butter.
✅ Chewy vs. Cakey: The extra egg yolk ensures a fudgy texture.
✅ Peanut Butter Cups: Use mini cups for even distribution, or chop larger ones.

📌 Variation Idea: Add chopped peanuts or chocolate chips for extra crunch!

4. Peanut Butter Frosting: Creamy Perfection {#frosting}

  • Buttercream vs. Cream Cheese Frosting? This version is butter-based for a silky texture.
  • Too Thick? Add milk, 1 tsp at a time.

5. Chocolate Ganache: Rich & Glossy {#ganache}

  • Best Chocolate: Semi-sweet balances sweetness, but dark chocolate works too.
  • Ganache Too Thin? Chill for 10 minutes before drizzling.

6. Baking Tips & Common Mistakes {#tips}

🔹 Don’t Overmix the batter—it makes blondies tough.
🔹 Cool Completely before frosting to prevent melting.
🔹 Storage: Keep in an airtight container for 3 days or freeze for 1 month.

7. Serving Suggestions {#serving}

🍦 Pair with: Vanilla ice cream, cold milk, or coffee.
🎉 Perfect for: Parties, potlucks, or a sweet treat at home!

8. Nutritional Information (Approximate) {#nutrition}

Serving (1 blondie)CaloriesCarbsFatProtein
1 square (1/16th)320 kcal38g18g5g

9. FAQs {#faq}

Q: Can I use milk chocolate instead of semi-sweet?
A: Yes, but it’ll be sweeter.

Q: Can I make these ahead?
A: Yes! Store frosted blondies in the fridge for up to 3 days.

Q: Why did my ganache seize?
A: The cream may have been too hot. Reheat gently with a splash of cream.

Final Thoughts: Bake, Share, Enjoy!

These peanut butter cup stuffed blondies are a decadent, crowd-pleasing dessert that’s easier to make than you think. With brown butter richness, peanut butter creaminess, and chocolate ganache luxury, every bite is pure bliss.

👉 Now it’s your turn! Bake these blondies, share your creations with us, and let us know how they turned out in the comments!

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Happy baking! 🍫🥜