Peanut Butter and Chocolate Brownies with Silky Frosting - Cook with Carla

Ingredients

• 12 tablespoons unsalted butter, sliced into individual tablespoons
• 1/2 cup semi-sweet chocolate chips
• 1/2 cup unsweetened cocoa powder
• 3/4 cup granulated sugar
• 3/4 cup brown sugar, tightly packed
• 2 large eggs
• 1 large egg yolk
• 1 teaspoon vanilla extract
• 1/2 teaspoon salt
• 1 cup all-purpose flour
• 1/2 cup mini chocolate chips, optional
• 3/4 cup creamy peanut butter
• 1/2 cup unsalted butter, softened to room temperature
• 1 1/4 cups powdered sugar
• 1/2 teaspoon vanilla extract
• 1 tablespoon heavy cream