Gluten-Free Keto Peanut Butter Swirl Brownies

Prep: 15 minCook: 25 min12 browniesmediumAmerican
Keto Peanut Butter Swirl Brownies with Almond Flour

Rich, fudgy keto brownies made with almond flour and sweetened with erythritol, featuring swirls of creamy peanut butter throughout. These low-carb treats satisfy chocolate cravings without the sugar, perfect for ketogenic dieters or anyone reducing carbs. The combination of cocoa powder and sugar-free chocolate chips creates deep chocolate flavor, while natural peanut butter adds protein and healthy fats. Ideal for dessert, snacks, or special occasions when you want indulgent treats that fit your macros.

Ingredients

Yield: 12 brownies
  • 1 cup almond flour
    coconut flour1:4ketonut-free

    Use 1/4 amount, add extra egg

    Full guide →
  • ¼ cup cocoa powder
  • ½ tsp baking soda
  • ¼ tsp salt
  • ½ cup unsalted butter, melted
  • ¾ cup erythritol
    monk fruit sweetener1:1ketosugar-free

    Works well but may have slight aftertaste

    Full guide →
  • 2 large eggs
  • 1 tsp vanilla extract
  • ½ cup sugar-free dark chocolate chips
  • ½ cup natural creamy peanut butter

Instructions

  1. 1

    Preheat oven to 350°F and line 8-inch square baking pan with parchment paper, leaving overhang for easy removal

  2. 2

    Whisk together almond flour, cocoa powder, baking soda, and salt in medium bowl

  3. 3

    Combine melted butter and erythritol in separate bowl, stirring until well mixed

  4. 4

    Beat in eggs one at a time, then stir in vanilla extract

  5. 5

    Gradually blend dry ingredients into wet mixture until just combined

  6. 6

    Fold in sugar-free chocolate chips

  7. 7

    Pour batter into prepared baking pan, spreading evenly with spatula

  8. 8

    Warm peanut butter in microwave until runny but not hot, about 30 seconds

  9. 9

    Drop dollops of peanut butter over brownie batter

  10. 10

    Use knife or toothpick to swirl peanut butter into batter, creating marbled effect

  11. 11

    Bake for 20-25 minutes until edges are set but center is still slightly soft

  12. 12

    Cool in pan for at least 10 minutes before lifting out and cutting into squares

Tips

Tip 1

Don't overbake - brownies should be slightly soft in center when done for fudgy texture

Tip 2

Let brownies cool completely before cutting for clean slices and best texture

Tip 3

Warm peanut butter just until spreadable to prevent it from sinking into batter

Good to Know

Storage

Store covered at room temperature up to 3 days or refrigerate up to 1 week

Make Ahead

Can be made 1-2 days ahead and stored covered

Serve With

Serve at room temperature or slightly chilled

Common Mistakes

Watch

Don't overmix batter to avoid tough brownies

Watch

Don't overbake to avoid dry texture

Watch

Don't skip cooling time to avoid crumbly cuts

Substitutions

Nut-Free Alternatives

natural peanut butter
almond butter1:1ketopeanut-free

Similar texture and fat content

Full guide →
almond flour
coconut flour1:4ketonut-free

Use 1/4 amount, add extra egg

Full guide →

General Alternatives

erythritol
monk fruit sweetener1:1ketosugar-free

Works well but may have slight aftertaste

Full guide →
Find more substitutions →

FAQ

Can I use regular sugar instead of erythritol?

Yes, but it won't be keto-friendly. Use 1/2 cup regular sugar and expect softer texture and higher carbs.

What if my brownies are too soft after cooling?

Refrigerate for 30 minutes to firm up, or bake 2-3 minutes longer next time for firmer texture.

How long do these brownies keep?

Store covered at room temperature up to 3 days or refrigerate up to 1 week for best quality and texture.