1. If you don't have whole wheat flour, you can substitute the same amount of all-purpose flour or white whole wheat flour in this recipe.
2. Dulce de leche can be made the day before, or you can use the can version.
3. If microwaving dulce de leche, be very careful with the timer so it doesn’t boil over inside the microwave. It will be a mess!
4. Store left over Dulce de Leche in the fridge.
5. Store brownies in an airtight container on the counter for up to 3 days.