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Close-up of a warm, crackly-topped Peanut Butter Brownies square with a melting scoop of vanilla ice cream beside it.

The Best Peanut Butter Brownies — Rich & Fudgy Dessert

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  • Author: Jennifer
  • Prep Time: 5 minutes
  • Cook Time: 40 minutes
  • Total Time: 45 minutes
  • Yield: 16 Servings 1x
  • Category: Dessert

Description

A quick, buttery tray bake that spotlights creamy peanut butter — chewy, slightly cakey bars made from pantry staples. Ready in under an hour and perfect warm with ice cream or boxed up for snacks.


Ingredients

Scale
  • 1 cup creamy peanut butter
  • 11 tablespoons unsalted butter, softened
  • 1 cup packed light brown sugar
  • 1 ⅓ cups granulated sugar
  • 2 teaspoons vanilla extract
  • 4 large eggs
  • 2 teaspoons baking powder
  • 1 teaspoon salt
  • 2 cups all-purpose flour


Instructions

  1. Preheat the oven to 325°F and grease a 9×13-inch baking pan (or line it with parchment for easy removal).

  2. In a large bowl or in a stand mixer, beat together the peanut butter, softened butter, brown sugar, granulated sugar, and vanilla until the mixture looks smooth and glossy.

  3. Add the eggs one at a time, mixing well after each addition so the batter becomes uniform.

  4. Stir in the baking powder and salt, then fold in the flour until the batter just comes together — avoid overmixing.

  5. Spread the batter evenly into the prepared pan, smoothing the top with an offset spatula or the back of a spoon.

  6. Bake until the surface springs back gently when pressed and a toothpick inserted in the center comes out with a few moist crumbs, about 40–45 minutes.

  7. Let the pan cool on a wire rack before cutting into squares.


Notes

  • For chewier bars, pull them from the oven a little early — residual heat will finish the cook.
  • To prevent dark edges, tent foil around the perimeter partway through baking.
  • Ovens vary, so keep an eye on timing and use the toothpick test.
  • FYI: natural peanut butter can make the batter oily; use a commercial creamy style for best texture.
  • Serve warm with vanilla ice cream or cool completely and store in an airtight container.

Nutrition

  • Calories: 356kcal
  • Sugar: 32g
  • Sodium: 297mg
  • Fat: 17g
  • Carbohydrates: 46g
  • Fiber: 1g
  • Protein: 7g
  • Cholesterol: 62mg