Preheat oven to 350 degrees F. Grease and flour a 9x13 inch baking pan, set aside.
In a large bowl combine all cake ingredients and mix on low for 30 seconds, then on high for 3 minutes scraping the bowl occasionally.
Pour into prepared pan and bake for 35-40 minutes or until toothpick inserted in center comes out clean. Set aside to cool.
Caramel Apples:
While the cake is baking combine the chopped apples and butter in a large skillet and saute on medium low for 10 minutes or until they start to soften. Add in brown sugar, cream and salt. Cook on medium low stirring occasionally for 10 minutes or until apples are tender. Stir in vanilla and remove from heat. Cool for 15 minutes.
Pour over baked cake and spread apples in an even layer. Cool completely.
After cake has cooled top with whipped topping and toffee bits. Store in refrigerator.
Notes
*Can also use a white or yellow cake mix to speed things up.