Food & Cooking Recipes Dessert & Treats Recipes Cake Recipes Cookies-and-Cream Sheet Cake Be the first to rate & review! By Martha Stewart Test Kitchen Martha Stewart Test Kitchen The recipes developed by our test kitchen team have undergone a rigorous process of development and testing, ensuring that every element is optimal, from ingredient amounts to method and cooking time. This process includes triple-testing recipes to ensure they meet our high standards. The many stellar cooks and food editors who have been part of our team include Sarah Carey, Lucinda Scala Quinn, Jennifer Aaronson, Shira Bocar, Anna Kovel, Greg Lofts, Riley Wofford, Lauren Tyrell, and Lindsay Leopold. Editorial Guidelines Updated on January 20, 2021 Print Rate It Share Share Tweet Pin Email Photo: Con Poulos Prep Time: 20 mins Total Time: 2 hrs Yield: 10 to 12 Serves A winner in ice cream aisles from coast to coast, this combination is both kid-friendly and well-liked by the grown-ups, too. Once the yellow-cake mixture is scraped into a buttered baking pan and smoothed with a spatula, you simply scatter broken Oreo cookies over the top for an easy and playful decoration. Ingredients 1 stick unsalted butter, melted and cooled, plus more, softened, for pans 1 ⅔ cups unbleached all- purpose flour 2 teaspoons baking powder ¾ teaspoon kosher salt (we use Diamond Crystal) 4 large eggs, room temperature 1 ½ cups sugar 2 teaspoons pure vanilla paste or extract ¾ cup sour cream, room temperature 10 cream-filled chocolate cookies, such as Oreos, broken into bite-size pieces Directions Preheat oven to 350°F. Brush a 9-by-13-inch or 8-by-12-inch baking pan with butter. Line with parchment, leaving a 2-inch overhang on long sides. Butter parchment. Whisk together flour, baking powder, and salt. Combine eggs and sugar in the bowl of a mixer fitted with the whisk attachment. Beat on high speed until thick and pale, about 4 minutes. Add flour mixture; beat just to combine. Add butter and vanilla; beat to combine. Add sour cream; beat until smooth. Scrape batter into prepared pan, smoothing top with a spatula. Sprinkle with cookie pieces. Bake until top springs back when lightly touched and a tester inserted in center comes out clean, 30 to 35 minutes (for 9-by-13-inch) or about 40 minutes (for 8-by-12). Let cool in pan on a wire rack 10 minutes. Using parchment overhangs, lift out of pan and let cool completely on rack. Cake can be stored at room temperature, wrapped in plastic, up to 1 day. Rate it Print