Chocolate Chip Cookie Brownie Bars

Bahan-bahan (24 porsi)

• 3/4 cup (12 Tbsp; 170g) unsalted butter, softened to room temperature
• 3/4 cup (150g) packed light or dark brown sugar
• 1/4 cup (50g) granulated sugar
• 1 large egg, at room temperature
• 2 teaspoons pure vanilla extract
• 2 cups (250g) all-purpose flour (spooned & leveled)
• 2 teaspoons cornstarch
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 1 and 1/2 cups (270g) semi-sweet chocolate chips
• 48 unwrapped miniature peanut butter cups (or 2 cups chopped peanut butter cups)
• 1/2 cup (8 Tbsp; 113g) unsalted butter
• two 4 ounce (226g) semi-sweet chocolate bars, coarsely chopped*
• 1 cup (200g) granulated sugar
• 3 large eggs, at room temperature
• 1 and 1/2 teaspoons pure vanilla extract
• 1/2 cup (63g) all-purpose flour (spooned & leveled)
• 1/4 teaspoon salt