Ultimate Fudgy Brownie & Peanut Butter Blondie Swirl (Gluten-Free, High-Protein Bliss!)

Oh friend… this one is dangerous in the very best way. Thank you for being here because today we’re making something that tastes like it belongs in a bakery window — but it’s secretly nourishing, gluten-free, and boosted with protein.

This Fudgy Brownie and Peanut Butter Blondie Swirl is rich, dense, and decadently moist thanks to one magic ingredient: Greek yogurt. That little addition adds protein, keeps everything tender, and gives the brownies that irresistible fudgy center we all crave.

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Now let’s bake something unforgettable.

Overview of Recipe Content

What Is Fudgy Brownie & Peanut Butter Blondie Swirl?

This recipe layers two batters into one pan:

• A deep, rich chocolate brownie base
• A creamy peanut butter blondie swirl

The result? A gorgeous marbled dessert with the best of both worlds — chocolate intensity and nutty sweetness — in every bite.

Why You’ll Love It

• Gluten-free
• Made with protein-rich Greek yogurt
• Extra moist and fudgy
• No dry, crumbly texture
• Actually filling and satisfying
• Perfect meal-prep dessert

What It Tastes Like

The brownie layer is dense, chocolatey, and slightly gooey in the center. The peanut butter blondie swirl adds creamy sweetness with a nutty depth that balances the cocoa perfectly.

It’s like a Reese’s brownie — but softer, richer, and homemade with heart.

Full Ingredients List (Complete Details)

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For the Fudgy Brownie Layer:

• 1/2 cup unsweetened cocoa powder
• 1/2 cup gluten-free all-purpose flour (with xanthan gum)
• 1/4 teaspoon salt
• 1/2 teaspoon baking powder
• 1/2 cup coconut sugar (or brown sugar)
• 1/4 cup granulated sugar
• 1/2 cup plain full-fat Greek yogurt
• 1/3 cup melted coconut oil (or unsalted butter)
• 2 large eggs, room temperature
• 1 teaspoon pure vanilla extract
• 1/2 cup dark chocolate chips (optional but recommended)

For the Peanut Butter Blondie Swirl:

• 1/2 cup natural creamy peanut butter (no added sugar preferred)
• 1/4 cup coconut sugar
• 1/4 cup plain Greek yogurt
• 1 large egg
• 1/2 teaspoon vanilla extract
• 1/4 cup gluten-free all-purpose flour
• 1/4 teaspoon baking powder
• Pinch of salt

Optional Add-Ins:

• Chopped roasted peanuts
• Flaky sea salt
• Extra chocolate chips

Tools You’ll Need

• 8×8-inch baking pan
• Parchment paper
• Mixing bowls
• Whisk
• Spatula
• Toothpick for swirling

If you love rich treats like this, you’ll also adore:

Protein Cookie Dough
https://poulef.com/protein-cookie-dough/

Peanut Butter Oat Bars
https://poulef.com/peanut-butter-oat-bars/

Healthy Apple Cinnamon Muffins
https://poulef.com/healthy-apple-cinnamon-muffins/

No Bake Energy Balls
https://poulef.com/no-bake-energy-balls/

Banana Oatmeal Breakfast Cookies
https://poulef.com/banana-oatmeal-breakfast-cookies/

Save your favorites on Pinterest at https://www.pinterest.com/poulefrecipe/

How to Make Fudgy Brownie & Peanut Butter Blondie Swirl

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Step 1: Preheat & Prep

Preheat oven to 350°F (175°C).
Line an 8×8-inch pan with parchment paper.

Step 2: Make the Brownie Batter

In a bowl, whisk cocoa powder, flour, salt, and baking powder.

In another bowl, whisk coconut sugar, granulated sugar, Greek yogurt, melted coconut oil, eggs, and vanilla until smooth.

Combine dry ingredients into wet ingredients. Fold in chocolate chips.

The batter will be thick and glossy — exactly what we want.

Step 3: Make the Blondie Swirl

Whisk peanut butter, sugar, Greek yogurt, egg, and vanilla until smooth.

Stir in flour, baking powder, and salt.

The texture should be creamy but scoopable.

Step 4: Layer & Swirl

Spread brownie batter into prepared pan.

Drop spoonfuls of peanut butter blondie batter over top.

Use a toothpick or knife to swirl gently.

Don’t overmix — we want beautiful marbling.

Step 5: Bake

Bake 28–32 minutes, until center is set but still slightly soft.

Do not overbake for maximum fudginess.

Cool completely before slicing.

What to Serve With It

• Cold glass of almond milk
• Espresso or cappuccino
• Vanilla Greek yogurt
• Fresh strawberries

It also makes a stunning dessert board for Pinterest-worthy gatherings.

Tips for Perfect Texture

• Use full-fat Greek yogurt for best moisture.
• Let brownies cool fully before cutting.
• Store chilled for cleaner slices.
• Slightly underbake for gooey center.

Storage Instructions

• Store in airtight container in fridge up to 5 days.
• Freeze individually wrapped squares up to 2 months.
• Let sit at room temp 10 minutes before serving.

General Information

Greek yogurt adds:

• Extra protein
• Moisture
• Tangy depth
• Tender crumb

This recipe balances indulgence with nourishment — something I always aim for in my kitchen.

Frequently Asked Questions

Is this recipe truly gluten-free?

Yes, when using certified gluten-free flour.

Can I make it dairy-free?

Use dairy-free yogurt alternative.

Can I reduce sugar?

You may substitute part with monk fruit sweetener.

Why is Greek yogurt important?

It adds protein and keeps the brownies moist without excess oil.

Can I double the recipe?

Yes! Use a 9×13-inch pan and increase bake time slightly.

Conclusion

This Fudgy Brownie & Peanut Butter Blondie Swirl is rich, moist, protein-boosted, and deeply satisfying. It proves that gluten-free desserts don’t have to be dry or boring — they can be indulgent and nourishing at the same time.

If you loved this, try my Protein Cookie Dough or Peanut Butter Oat Bars next.

Thank you for baking with me today. Your kitchen is where comfort lives.

Interactive Elements

If you try this recipe, leave a comment and rating below!

Share your swirl masterpiece on Pinterest at https://www.pinterest.com/poulefrecipe/ and tag me — I love seeing your creations.

Nutritional Information (Per Square – 12 squares)

Nutrient	Amount
Calories	240 kcal
Protein	7g
Carbohydrates	24g
Fiber	3g
Sugar	16g
Fat	14g
Saturated Fat	6g
Sodium	120mg

Approximate values.

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