Modified from My Recipes
3 cups light brown sugar, packed
2 cups butter, melted (they said unsalted, I used salted....)
3 eggs, lightly beaten (they say large, I only buy extra-large)
1 tbsp vanilla
2 cups flour
1 cup uncooked regular oats
1 tsp baking powder
1/2 tsp baking soda
3/4 tsp salt
6 caramel-peanut bars, chopped (they used 2.07 oz Snickers...I actually used PayDays, as they are my Mom's favorite and I was making these for hers...I think something like Snickers would probably actually make this a letters less gooey, but everyone liked these as is)
1 (14 oz) can dulce de leche (I did find a squeezy bottle of this that was like 15 oz that I used....I honestly think you could just use regular caramel sauce like you buy in the ice cream aisle...this was in the Mexican aisle, by the way)
Combine first 4 ingredients in a large bowl and stir. Combine flour, oats, baking powder, baking soda, and salt. Add to butter mixture, stirring until just blended. Fold in chopped candy cars.
Put batter in foil lined 13 by 9 pan. Make sure to full foil this - it is STICKY!!!. Spoon dulce de leche over batter, swirl...I actually think I had too much...I did use it all though.
Bake at 325 for 1 hour and 5 minutes. Remove to a wire rack and cool completely (REALLY!!).
Lift out with foil and then peel off foil (seriously, this is hard - this is sticky, sticky, sticky). Cut into bars.
Makes 2 dozen.