Peanut Butter Cake

Cake:

• 1 cup all-purpose flour
• 1 cup plus 2 tablespoons sugar
• 3 1/2 teaspoons baking powder
• 1 teaspoon salt
• 2 cups graham cracker crumbs
• Peanut butter (at least 1/2 cup; if using more, decrease shortening by an equal amount)
• 3/4 cup shortening
• 1 cup plus 2 tablespoons milk
• 1 teaspoon vanilla extract
• 3 eggs

Frosting:

• 2 cups confectioners' sugar
• 2 tablespoons cocoa
• 8 tablespoons (1 stick) butter
• 1/3 cup heavy cream
• 1/2 cup peanuts, salted
• 2 cap-fulls vanilla extract