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Moist Peanut Butter Cake
Ingredients
  • subheading: Peanut Butter Cake:
  • 1⅔ cups ( 210 g) all purpose flour
  • 3 tbsp ( 24 g) cornstarch
  • ½ tsp baking soda
  • 2 tsp baking powder
  • ½ tsp salt - omit if using salted butter
  • ⅓ cup ( 80 g) unsalted butter - room temperature
  • ⅓ cup ( 75 g) unflavored vegetable oil - I use canola oil
  • ½ cup ( 100 g) white granulated sugar
  • ¾ cup ( 150 g) soft brown sugar - in the US use light soft brown sugar
  • ⅔ cups ( 150 g) unsweetened peanut butter - use a creamy, processed one (see note 5 if using a sweetened version like Skippy)
  • 3 large eggs - room temperature
  • 1½ tsps vanilla extract/essence
  • 1 cup ( 225 g) buttermilk - room temperature
  • subheading: Peanut Butter Frosting:
  • 1½ cups ( 340 g) unsalted butter - room temperature
  • 3 cups ( 375 g) powdered sugar - also known as icing or confectioners sugar
  • 2 tsps vanilla extract/essence
  • ½ cup ( 120 g) whipping or heavy cream - room temperature
  • ½ tsp salt
  • 1 cup ( 250 g) unsweetened peanut butter - use a creamy version
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