1boxbrownie mix such as Ghirardelli Ultimate Chocolate Premium(19 oz box)
1largeegg or amount listed on box
¼cupvegetable oil or amount listed on box
¼cupwater or amount listed on box
½cupchocolate chips (optional)
Chocolate Chip Bar Topping
½cupvegetable oil, the freshest available
½cuplight brown sugar, tightly packed(100-110 grams)
¼cupgranulated sugar(50 grams)
1largeegg
1teaspoonvanilla
¼teaspoonsalt plus a pinch
¼teaspoonbaking soda
1cupall-purpose flour(127 grams)
1cupchocolate chips plus a handful of optional M&Ms
Instructions
Preheat oven to 325 degrees. Line a 9x12 or 9x13 inch pan with nonstick foil or parchment or line with regular foil and spray bottom only with cooking spray.
In a mixing bowl, prepare brownie mix as directed on the box using egg, oil and water as called for. Stir in some extra chocolate chips if desired.
Spread the mixture over the bottom of the pan, then make the cookie layer.
Rinse out the bowl and add the oil, both sugars, egg and vanilla. Mix well, then stir in salt and baking soda until evenly blended. Stir in flour to make a very soft dough, Stir in the chocolate chips. Drop spoonfuls of the dough over the brownie batter, spreading gently to cover, but leaving some gaps so the brownie batter shows through. Sprinkle with M&MS if using. Strongly recommend. The minis are perfect for these.
Bake for about 35 to 40 minutes (other brands of brownie mix or thicker layers will take longer) or until the chocolate chip cookie layer is golden. Let cool completely, then lift from pan and cut into bars.