Peanut Butter Blondies


Prep Time: 15 minutes
Cook Time: 30 minutes
Total Time: 45 minutes
Servings: 12–15 squares
Category: Dessert


Notes After Making

Add


Ingredients

  • ½ cup (113g) unsalted butter, melted and slightly cooled
  • 1⅓ cups (265g) packed light or dark brown sugar
  • ½ cup (125g) creamy peanut butter
  • 1 large egg + 1 egg yolk
  • 2 teaspoons pure vanilla extract
  • 1⅓ cups (165g) all-purpose flour (spooned and leveled)
  • ¾ teaspoon baking powder
  • ¾ teaspoon salt
  • ⅔ cup (about 130g) chocolate chips or Reese’s Pieces, optional

Instructions

Prepare the Pan

  1. Preheat oven to 350°F.
  2. Line a 9×9-inch baking pan with parchment paper, leaving an overhang for easy removal.

Make the Batter

  1. In a large bowl, whisk together melted butter and brown sugar until smooth.
  2. Whisk in peanut butter until fully combined.
  3. Add egg, egg yolk, and vanilla extract, mixing until smooth.
  4. Add flour, baking powder, and salt.
  5. Fold gently with a spatula until a thick batter forms.
  6. Fold in chocolate chips or Reese’s Pieces.

Bake

  1. Spread batter evenly into prepared pan.
  2. Bake for 28–30 minutes, checking at 28 minutes.
  3. A toothpick inserted should come out with a few moist crumbs (not wet batter).
  4. Continue checking every 2 minutes if needed.

Cool & Serve

  1. Cool completely in the pan.
  2. Lift out using parchment overhang and slice into 12–15 squares.
  3. Serve plain or with vanilla ice cream, if desired.

Jessica’s Notes

Best Served With

  • Vanilla ice cream
  • Whipped cream

Make Ahead

  • Bake up to 2 days in advance.
  • Store tightly wrapped at room temperature once cooled.

Storage

Store in an airtight container at room temperature for up to 4 days or refrigerate for up to 1 week.

Freezer-Friendly

Freeze cut bars for up to 2 months. Thaw at room temperature before serving.

Variations

  • Swap chocolate chips for white chocolate or butterscotch chips
  • Add chopped nuts for extra crunch
  • Swirl in Nutella before baking
  • Add flaky sea salt on top after baking
  • Use almond butter instead of peanut butter for a different flavor profile

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