Make the cake according to ... bit. Pour sweetened condensed milk into the holes. Pour the butterscotch or caramel topping on top. Let stand ... whipped topping. Crush candy bars and sprinkle over top of cake.
Melt butter in a saucepan. Add sugar, milk, and syrup. Stir constantly ... 240 degrees on candy thermometer (cook slowly). Cook about ... wrap in wax paper.