Peanut Butter Blondies

Bahan-bahan (18 porsi)

• 3/4 cup (170g) unsalted butter, melted and slightly cooled
• 2 cups (400g) packed light or dark brown sugar
• 3/4 cup (190g) creamy peanut butter
• 2 large eggs + 1 extra egg yolk
• 1 Tablespoon pure vanilla extract
• 2 cups (250g) all-purpose flour (spooned & leveled)
• 1 teaspoon baking powder
• 1 teaspoon salt
• 1 and 1/4 cups (about 260g) Reese’s Pieces