Let's Bake

Peanut Butter Blondies

Yield Makes 16 squares 1x
Prep: 20 minutesCook: 30 minutesTotal: 50 minutes

Buttery Peanut Butter Blondies made from scratch. 


  • 115 grams (1/2 cup or 1 stick) butter, melted
  • 125 grams (1/2 cup) smooth peanut butter*
  • 225 grams (1 and 1/4 cup) brown sugar
  • 1 teaspoon vanilla extract
  • 1 egg + 1 egg yolk
  • 175 grams (1 and 1/4 cup) plain flour or all purpose flour 
  • 1/2 teaspoon baking powder
  • 150 grams (1 cup) chocolate chips
  • 30 grams (1/2 cup) mini marshmallows


  1. Preheat oven to 180 C (350 F) standard / 160 C (320 F) fan-forced. Grease and line an 8-inch square baking tin with baking or parchment paper, ensuring two sides overhang.
  2. In a large mixing bowl, add melted butter. Then add peanut butter, sugar, vanilla and eggs and gently whisk together. 
  3. Add flour and baking powder. Stir until smooth batter forms. Add chocolate chips and marshmallows and stir again. 
  4. Pour blondie batter into prepared tin, smooth the top and place in the oven. Bake blondies for approximately 30 minutes or until golden on the edges and a skewer inserted in the middle comes out clean.
  5. Leave in pan to cool completely – blondies will firm up as they cool. Cut into squares to serve.


*Peanut butter: I recommend using a full fat processed peanut butter like Bega, Skippy and Jif. 

Nutrition Information

Serving Size: 1 square Calories: 252 Sugar: 20.8 g Sodium: 44.7 mg Fat: 13.2 g Carbohydrates: 31.4 g Protein: 4.2 g Cholesterol: 38.6 mg
Nutrition information is a guide only.
Author: Jessica HolmesCategory: DessertCuisine: American
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