Chocolate Peanut Butter Cake

INGREDIENTS

• 2 1/4 cups cake flour
• 2 1/2 teaspoons baking powder
• 1 teaspoon salt
• 1 1/4 cups sugar
• About 1/2 cup unsalted butter, at room temperature
• 1/2 cup creamy peanut butter
• 2 large eggs
• 2 teaspoons vanilla extract
• 2/3 cup milk
• 3/4 cup creamy peanut butter
• 8 ounces cream cheese, at room temperature
• 1 cup powdered sugar
• 1/4 cup milk
• Fudge Frosting
• 2 Reese's Peanut Butter Cups, quartered
• 1/2 cup dry-roasted peanuts