Inspired by Australia's Anzac bars, these Oatmeal Caramilk Bars were developed using common North American ingredients that are more readily available. It's hard to believe these delicious cookies are prepared with only four ingredients! And, they're no-bake too which is always a bonus!
Line a 9×9 inch baking pan with parchment paper. Fold the parchment paper so that it fits snugly in the pan. I use two sheets – one folded to fit the length of the pan and another folded to fit across the pan. Allow the excess parchment paper to hang out over the side of the pan. Once the confection is firm, use the excess parchment to lift the whole block out of the pan to make it easy to cut into squares.
Transfer the oatmeal cookies to a food processor and pulse until you are left with fine crumbs. Transfer the crumbs to the mixing bowl.
Add the melted butter and a third of the sweetened condensed milk. Use a spoon to mix those ingredients together.
Transfer the mixture to the prepared pan and press it in so that you have a very flat, firm layer.
Place the unwrapped Caramilk bars into a microwave-safe bowl with the remaining sweetened condensed milk. Microwave at half power in 30-second increments, stirring well between each increment until the mixture is melted and smooth.
Pour the chocolate and sweetened condensed milk mixture over the cookie base and spread it out to an even layer. Transfer to the fridge for one hour before cutting into squares.
Package and a food-safe container and keep refrigerated.