Peanut Butter and Mascarpone Frosting

When I first started working as a pastry chef, I loved experimenting with different frostings. Buttercream was my go-to, but one day I had some leftover mascarpone from a dessert special, and I decided to try it in a frosting.

The result? Pure magic. This Peanut Butter and Mascarpone Frosting is rich yet light, sweet yet savory, and absolutely irresistible. It’s now one of my most requested frostings for cakes and cupcakes!

Whether you’re a seasoned baker or just starting out, this recipe is simple yet impressive — perfect for adding a sophisticated touch to your bakes.

Why You’ll Love This Homemade Peanut Butter Frosting With Mascarpone

I’ve worked with countless frosting recipes over the years, but this one is truly special. Combining peanut butter and mascarpone creates a unique flavor that’s both indulgent and balanced.

Whether you’re dressing up a birthday cake or adding a twist to cupcakes, this frosting will elevate your bakes like no other.

✔️ Incredibly Creamy Texture: Thanks to mascarpone’s rich, velvety consistency, this frosting feels luxurious on the palate.

✔️ Perfect Sweet-Savory Balance: The nutty depth of peanut butter blends beautifully with the mild sweetness of powdered sugar and the rich creaminess of mascarpone.

✔️ Versatile and Easy to Work With: Whether you’re piping delicate swirls or spreading it generously over a cake, this frosting holds its shape beautifully.

✔️ Minimal Effort, Maximum Flavor: With just a few simple ingredients, you’ll create a frosting that’s decadent enough for special occasions yet easy enough for everyday bakes.

Ingredients You’ll Need

Every ingredient in this frosting has a purpose, and as a trained pastry chef, I know firsthand that using the right products makes all the difference.

That’s why I always recommend choosing high-quality mascarpone and peanut butter for the richest flavor.

• Mascarpone Cheese – This rich, creamy cheese is the secret to the frosting’s luxurious texture. Use full-fat mascarpone for the best results.
• Peanut Butter – Go for smooth peanut butter to ensure a silky consistency. Natural peanut butter works too, but make sure to stir it well to incorporate the oils.
• Butter – Adds richness and stability to the frosting. Use unsalted butter so you can control the seasoning.
• Powdered Sugar – Provides just the right amount of sweetness without being overpowering.
• Pinch of Salt – Balances the sweetness and enhances the peanut butter’s nutty flavor.

How to Make Peanut Butter and Mascarpone Frosting

I’ve tested this recipe more times than I can count, and these steps — along with a few pro tips — ensure it comes out perfect every time.

1.Prepare the Ingredients: Start by ensuring your butter and peanut butter are both softened. Cold ingredients won’t blend smoothly, so I recommend taking them out of the fridge about 30 minutes before you begin.

2.Mix the Base: In a mixing bowl, stir the softened peanut butter, butter, and powdered sugar. Once combined, switch to a whisk or a hand mixer. Beat the mixture on medium speed for 2–3 minutes until it’s light and fluffy.

🧑‍🍳 Pro Tip: Stirring the powdered sugar in before beating helps reduce the mess and ensures it blends smoothly. This simple step keeps your kitchen (and your apron) powder-free!

3.Add the Mascarpone: Add the mascarpone cheese and beat on low for another 2–3 minutes. The mixture will turn beautifully creamy and smooth.

🧑‍🍳 Pro Tip: Don’t overbeat the mascarpone — it’s naturally rich, and overmixing can cause it to become grainy. Once it’s incorporated and fluffy, stop mixing.

4.Chill Before Using: Transfer the frosting to a bowl and pop it in the fridge for at least an hour before using. This step helps the flavors meld and gives the frosting time to firm up — ideal for piping or spreading.

Tips for Perfect Frosting

As a pastry chef with over 15 years of experience, I’ve picked up some handy tricks to ensure your frosting turns out flawless every time:

• Room Temperature Ingredients: Make sure your butter and peanut butter are softened, and your mascarpone isn’t too cold when you add it to avoid curdling.
• Sift Your Powdered Sugar: This removes lumps and creates a smoother frosting.
• Chill Before Piping: Refrigerating the frosting for an hour makes it easier to handle and helps it hold its shape beautifully.
• Taste as You Go: Peanut butter brands vary in saltiness, so adjust the powdered sugar or add a pinch of salt if needed.

Creative Ways to Use This Frosting

One of my favorite things about this frosting is how versatile it is. While it’s heavenly on cakes, I’ve also discovered some fun and unexpected ways to enjoy it over the years.

• Dip for Fresh Fruit: Spread it on apple slices or dip strawberries for a decadent snack.
• Sandwich Between Cookies: Create irresistible cookie sandwiches with this rich, creamy filling.
• Swirl on Pancakes or Waffles: Add a dollop to your breakfast for a peanut butter-inspired treat.
• Stuffed Cupcakes: Hollow out cupcakes and fill them with this frosting for a delightful surprise.

Best Pairings for This Frosting

This frosting is incredibly versatile! Here are a few of my favorite pairings:

• Chocolate Cake or Cupcakes: The deep richness of chocolate pairs beautifully with the creamy, nutty frosting.
• Banana Bread or Muffins: A dollop of this frosting takes banana bakes to the next level.
• Brownies: Spread a generous layer on top for a peanut butter twist on classic brownies.
• Cookies: Use it as a filling between two cookies for an indulgent treat.

FAQs

Q: Can I freeze peanut butter and mascarpone frosting?

A: I wouldn’t recommend it. Mascarpone’s delicate texture can become grainy after freezing. For best results, make it fresh and store it in the fridge.

Q: How long does this frosting last in the fridge?

A: Stored in an airtight container, it will keep for up to 4 days. Just give it a quick whisk before using to restore its fluffiness.

Q: Can I substitute cream cheese for mascarpone?

A: Yes, but the flavor will be tangier and less rich. If you’re making this swap, I recommend adding a little extra powdered sugar to balance the flavors.