Recipe

She had all the ingredients for the cake that she'd found on that website she liked.
She looked down into the shopping basket to mentally check one last time before she headed to the checkout.
Milk, flour, eggs, baking powder, chocolate, arsenic.
The last ingredient was certainly unconventional, but the recipe had said it was essential for the task at hand.
She couldn't wait to see her husband's face when she told him after he'd eaten it.