peanut butter brownies

INGREDIENTS

• 2 sticks (1/2 pound) unsalted butter, softened
• 1 3/4 cups sugar
• 1 cup creamy peanut butter
• 2 large eggs plus 1 large yolk
• 2 teaspoons pure vanilla extract
• 2 cups all-purpose flour
• 1 1/2 cups semisweet chocolate chips (9 ounces)**
• 1/2 teaspoon salt, see note**
• 1/2 cup heavy cream
• 1 tablespoon unsalted butter, softened