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Dark Chocolate Peanut Butter Swirl Blondies

Dark Chocolate Peanut Butter Swirl Blondies

Thick, chewy, and loaded with rich chocolate and creamy peanut butter. These easy blondies are a one-bowl wonder perfect for any dessert lover.
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Prep Time 10 minutes
Cook Time 25 minutes
Total Time 35 minutes
Servings: 16 Bars
Course: Baking
Cuisine: American
Ingredients Equipment Method Notes

Ingredients
  

  • 1/2 cup Unsalted Butter melted and slightly cooled
  • 3/4 cup Brown Sugar packed, for moisture and flavor
  • 1/4 cup Granulated Sugar for crispy edges
  • 1 large Egg + 1 Egg Yolk room temperature
  • 1 tsp Vanilla Extract
  • 1 cup All-Purpose Flour spooned and leveled
  • 1/2 tsp Salt
  • 1/3 cup Creamy Peanut Butter melted for swirling
  • 3/4 cup Dark Chocolate Chunks or Chips

Equipment

  • 8×8 baking pan
  • Mixing bowls
  • Whisk
  • Rubber Spatula
  • Parchment paper

Method
 

  1. Prep: Preheat oven to 350°F (175°C). Line an 8x8 inch pan with parchment paper and grease lightly.
  2. Mix Butter & Sugar: In a large bowl, whisk melted butter, brown sugar, and granulated sugar until smooth and glossy.
  3. Add Wet Ingredients: Whisk in the egg, egg yolk, and vanilla extract until fully combined.
  4. Add Dry Ingredients: Stir in flour and salt gently with a spatula. Stop when flour just disappears.
  5. Fold: Fold in 1/2 cup of the dark chocolate chunks.
  6. Assemble: Pour batter into the pan. Drizzle melted peanut butter over the top and swirl with a knife. Top with remaining chocolate.
  7. Bake: Bake for 22–26 minutes. Edges should be golden; center should be slightly soft.
  8. Cool: Let cool completely in the pan before cutting into squares.

Notes

Notes:
  • Use commercial peanut butter (like Jif/Skippy) for the best texture; natural types may be too oily.
  • Do not overbake. The bars continue to firm up as they cool.
  • For clean cuts, wipe your knife with a warm, damp cloth between slices.
Nutritional Facts (Per Serving):
  • Calories: 210 kcal
  • Carbohydrates: 24g
  • Protein: 4g
  • Fat: 12g
  • Sugar: 16g
  • Fiber: 1g