Welcome to the BB.
Not sure if this fits your description, but since it has no frosting, I think it could pass for Coffee Cake. You could make the topping more taffy or caramel-like by cooking it for a couple minutes to thicken it a little.
Anyway, it's delicious.
Apple Dumpling Cake
1 1/2 cups oil
3 eggs
2 cups sugar
2 teaspoons vanilla
3 cups flour
1 teaspoon baking soda
1 teaspoon salt
2 teaspoons cinnamon
3 cups diced apples (peel if you wish, but not necessary)
1 cup chopped nuts
Preheat oven to 350 degrees.
In large bowl, mix oil, eggs, sugar and vanilla.
Add dry ingredients and mix well.
Stir in apples and nuts.
Spread in greased 9x13-inch pan.
Bake approximately 1 hour.
Pour topping over hot cake immediately after removing from oven.
TOPPING:
1 cup brown sugar
1/4 cup milk (I use evaporated)
1/2 cup butter
Combine in saucepan. Heat until butter is melted and brown sugar is dissolved. Pour over hot cake.
Topping will soak into the cake, making it very moist.