Can be doubled by using two 9x13 pans for each component; brownie baking time will increase to about 25 minutes
To make in advance:Brownie can be baked up to two months in advance if wrapped well in tin foil and frozen (I recommend keeping parchment paper on bottom)
Remainder of recipe can be completed up to one week in advance of serving; store entire dessert well wrapped in tin foil refrigerator
Completed dessert can also be frozen up to one month
Rice Krispie treat recipe from
Brown Eyed Baker