Beat eggs with sugar until fluffy, add oil, and whip again. Fold in flour and butterscotch essence, then bake for 30-40 minutes. Cool, chill the cake, then slice into three layers. Make butterscotch ...
Combine cold milk, butterscotch essence, sugar, and butterscotch sauce in a blender. Add ice cubes and blend until frothy. Add ice cream as desired and blend again. Pour the mixture into glasses.