Chocolate Cake with Milk Chocolate-Peanut Butter Frosting and Peanut Butter Brittle

Ingredients

• Vegetable oil
• 1 cup sugar
• ½ cup light corn syrup
• ¼ cup water
• 1 cup lightly salted dryroasted peanuts
• ½ teaspoon baking soda
• ½ teaspoon vanilla extract
• + 17 more ingredients
• • 4 ounces imported milk chocolate
  • 5 tablespoons heavy whipping cream
  • 2 ¼ cups powdered sugar
  • Nonstick vegetable-oil spray
  • ²/₃ cup natural unsweetened cocoa powder
  • 1 teaspoon salt
  • 2 cups water
  • ²/₃ cup vegetable oil
  • 2 tablespoons cider vinegar
  • 2 teaspoons vanilla extract
  • ¾ cup creamy (smooth) natural peanut butter (made with only peanuts and salt)
  • 2 teaspoons baking soda
  • 2 cups sugar
  • 1 teaspoon creamy (smooth) natural peanut butter (made with only peanuts and salt)
  • 1 ½ cups heavy whipping cream
  • ¾ cup mascarpone cheese*
  • 3 cups all-purpose flour

Line large rimmed baking sheet with foil; brush with oil. Bring sugar, corn syrup, and 1/4 cup water to boil in heavy medium saucepan over medium-high heat, stirring until sugar dissolves. Boil without stirring until syrup is deep amber, swirling pan occasionally, about 10 minutes. Immediately st...

View full recipe at Epicurious