Oatmeal Carmelitas

I'm not sure where I found this recipe, but I've had it a long time.  Its a great take for a "bring a dish to pass"  if you want to bring a dessert.

1 cup all-purpose flour 
1 cup quick rolled oats 
3⁄4 cup brown sugar
1⁄2 tsp. baking soda
1⁄2 cup butter, melted 
6 oz. semi-sweet or milk chocolate chips 
1⁄2 cup chopped walnuts 
3⁄4 cup caramel ice cream topping 
3 tbsp. flour
1⁄2 tsp. salt

Preheat oven to350*F and grease bottom and sides of a 9x9-inch pan.  Combine dry ingredients well, then slowly pour and mix melted butter into dry ingredients to form a crumb-like consistency. Press half of these crumbs into bottom of pan and bake for 10 minutes.  Sprinkle chocolate chips and walnuts over baked crust.  Mix caramel topping with flour. Drizzle mixture over chocolate chips and nuts. Sprinkle the remaining crumbs over the top. Bake for 15-20 more minutes.

Chill in fridge for easy cutting.