This recipe creates a uniquely moist and tender chocolate cake, secretly enriched with cold mashed potatoes. The potatoes contribute to an incredibly soft texture and rich mouthfeel without imparting a distinct potato flavor, resulting in a surprisingly delightful and indulgent dessert.
For the best texture, ensure your mashed potatoes are completely smooth and cold before incorporating them; any lumps will result in an uneven crumb. Using unsalted butter allows for better control over the cake's overall seasoning. Sifting your dry ingredients (flour, cocoa, baking soda) prevents lumps and aerates them, leading to a lighter, more tender cake. Be careful not to overmix the batter once the dry ingredients are added, as this can develop gluten and result in a tough cake. Mix only until just combined. A cream cheese frosting would beautifully complement the subtle richness of this potato cake.