It's neither chocolate nor caramel, but our family's favorite cake is Honey Bun cake.
1 (18.25 ounce) package yellow cake mix
3/4 cup vegetable oil
4 eggs
1 (8 ounce) container sour cream
1/3 cup honey
3/4 cup brown sugar (more or less to taste)
1 tablespoon ground cinnamon
chopped pecans
GLAZE
2 cups confectioner's sugar
4 tablespoons milk
1 tablespoon vanilla extract
Preheat oven to 325 degrees F .
In a large mixing bowl, combine cake mix, oil, eggs and sour cream. Stir by hand until most of the lumps are gone.
Pour the batter into an greased 9x13 glass pan. Top with a thin layer of honey. (I don't measure the honey -- just squeeze it out until the top is somewhat covered.)
Combine the brown sugar, cinnamon and pecans, and sprinkle over the batter in the cake pan.
Swirl the cake slightly with a butter knife.
Bake in preheated oven for 40-50 minutes, or until a toothpick inserted into the center of the cake comes out clean.
Make the frosting by mixing together the confectioner's sugar, milk and vanilla until smooth. Frost cake while it is still fairly hot (15-20 minutes after you take it out of the oven). Serve warm for maximum enjoyment. :)
A similar recipe is on allrecipes.com --
http://allrecipes.com/Recipe/Honey-Bun-Cake-I/Detail.aspx