Milk Chocolate Peanut Butter Truffle Brownies

Bahan-bahan (16 porsi)

• 1 1/2 sticks (12 tablespoons) salted butter
• 1 1/2 cups semi-sweet or milk chocolate chips
• 1 cup granulated sugar
• 1 tablespoon Kahlúa ((optional))
• 2 teaspoons vanilla extract
• 2 teaspoons instant coffee ((optional))
• 3 large eggs, at room temperature
• 1/3 cup all-purpose flour
• 1/3 cup unsweetened cocoa powder
• 3/4 teaspoon baking powder
• 1/4 teaspoon kosher salt
• 2 (3.2 ounce) semi-sweet chocolate bars, chopped
• 1/3 cup heavy cream
• 1/3 cup creamy peanut butter
• 1 (3.2 ounce) milk chocolate bar, chopped
• 1 cup granulated sugar