Toffee Bundt Cake

INGREDIENTS

 * 2 1/4 cups all-purpose flour
 * 3/4 cup cake flour
 * 1 3/4 teaspoons baking powder
 * 1 teaspoon baking soda
 * 1/2 teaspoon salt
 * 10 to 12 ounces Heath bars, chopped
 * 1 cup milk chocolate chips
 * 1 cup salted butter, softened
 * 1 1/4 cups granulated sugar
 * 3/4 cup firmly packed light brown sugar
 * 3 large eggs
 * 2 1/2 teapsoons vanilla extract
 * 1 1/3 cups plus 2 tablespoons sour cream
 * powdered sugar

INSTRUCTIONS

 * Preheat oven to 350 degrees and spray a 12-cup Bundt pan with baking spray with flour.
 * Sift the all-purpose flour, cake flour, baking powder, baking soda, and salt together onto a piece of wax paper.
 * In a medium bowl, combine the chopped Heath bars and chocolate chips. Add 1 1/2 tablespoons of the flour mixture and stir together.
 * Using an electric stand mixer with a paddle attachment, cream the butter at medium speed for 3 minutes.
 * Add half the granulated sugar and beat for 2 minutes.
 * Add the remaining granulated sugar and beat for 1 minute. Scrape down the sides of the bowl.
 * Add the brown sugar and beat for 2 minutes.
 * Beat in the eggs, one at a tme, beating for 45 seconds after each addition. Srape down the sides of the bowl.
 * Add the vanilla extract.
 * With mixer on LOW speed, add the flour mixture in 3 additions, alternating with the sour cream in two additions. Stop a few times to scrape down the sides of the bowl.
 * Stir in the Heath bar/chocolate chip mixture. Transfer batter to the Bundt pan. Place it on a baking sheet in case any overflows. (It shouldn't unless you are using a smaller bundt pan but it's best to be safe.)
 * Bake for 55 to 60 minutes or until a toothpick inserted in the center comes out clean.
 * Let cool in the pan for 10 minutes and then invert onto a serving platter.
 * Once cool, sift powdered sugar over the cake.