Created by breezermom on December 7, 2016
Step 1: Preheat the oven to 350°.
Step 2: Combine the first 5 ingredients in a large bowl; beat with a mixer at low speed for 1 minute or until well combined.
Step 3: Add the cake mix to the buttermilk mixture; beat at medium speed 1 minute or until well blended.
Step 4: Stir in carrot and apple until just combined. Divide batter evenly among 3 8-inch round cake pans coated with baking spray.
Step 5: Bake at 350° for 20 minutes or until a wooden pick inserted in the center comes out clean. Cool the cakes in pans on a wire rack for 10 minutes. Remove cakes from pans; cool completely on wire racks.
Step 6: Melt butter in a small saucepan over medium-low heat; cook 6 minutes or until lightly browned, stirring frequently. Cool slightly.
Step 7: Combine browned butter, 1 1/2 cups powdered sugar, cream cheese, milk, vanilla, and salt in a medium bowl; beat with a mixer at low speed for 2 minutes or until smooth.
Step 8: To assemble the cake, place 1 cake layer ona plate; spread 1/4 cup glaze over the cake layer. Top with the second layer and spread with 1/4 cup glaze. Top with the third layer. Stir the remaining 1/2 cup powdered sugar into the remaining glaze. Spread the remaining glaze over the top of the cake. Sprinkle with the chopped pecans.