The no-bowl choc slice (or seven-layer bar in the US) is a magical confection in which a bunch of crunchy, sweet things are layered on top of each other and held together by sweetened condensed milk. They are very good, but very sweet, and -- like everything -- benefit from the addition of potato chips.
Photo by Mattie Hagedorn.
The video above will walk you through it, but it's really just a matter of swapping out a sweet base like biscuit for a salty potato chip. You can doctor your own bar recipe or use the one linked below.
To make the base, pulse 280g of (thin) potato chips in a food processor with 3 tablespoons of flour. Add in four tablespoons of melted butter and pulse until the chips are "evenly moistened and finely chopped." Press into a baking pan, bake at 180C until lightly browned, and then pile on the rest of your delicious layers according to whatever recipe you happen to be using.
These Magic Bars Have a Truly Magic Ingredient [Epicurious]