How are the pancake puppies served before plating?

Pancake puppies are served by being tossed in powdered sugar and accompanied by icing before plating. This method enhances the visual appeal and flavor profile of the dish, making it more enticing for customers. The powdered sugar adds a sweet touch, while the icing provides a delicious dipping option that complements the warm, fluffy texture of the pancake puppies. This combination is particularly effective in creating a fun and indulgent dining experience, which aligns well with Denny's brand image of casual, comfort food.

The other methods of serving, such as using chocolate sauce or serving them plain, do not align with the standard presentation and serving style of pancake puppies at Denny's. Topping with whipped cream or offering a side of syrup lacks the distinctive sweet and festive touch that powdered sugar and icing provide. This is why option A stands out as the correct answer for how pancake puppies are prepared and served.