Food & Cooking Recipes Dessert & Treats Recipes Cake Recipes Orange-and-Poppy-Seed Sheet Cake 4.0 (1) This easy single-layer cake suits so many occasions. Close Credit: Con Poulos Prep Time: 20 mins Total Time: 2 hrs 20 mins Servings: 10 to 12 Jump to recipe Full of citrus flavor, this easy orange sheet cake includes orange zest, sour cream, poppy seeds, and vanilla in the batter and orange juice in the simple yet luscious icing. It’s a single-layer cake that serves a crowd at a party or makes a delicious any-day snacking cake. Shower it with more poppy seeds and get creative when cutting—who says squares are the only way to go? Try small and large planks, slices on the bias, and even triangles, all are fair game when you're serving a sheet cake. 21 Easy, Crowd-Pleasing Sheet Cakes for Any Occasion How to Make Orange Sheet Cake Ahead The baked and cooled cake can be stored at room temperature, wrapped in plastic, up to 1 day before icing and serving. The iced cake can be stored in an airtight container at room temperature for up to 3 days. Directions Preheat oven; prep pan: 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. Mix dry ingredients; beat eggs and sugar: 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 to egg mixture; add other ingredients: Add flour mixture; beat to combine. Add butter, zest, poppy seeds, and vanilla; beat to combine. Add sour cream; beat until smooth. Transfer batter to pan and bake: Scrape batter into prepared pan, smoothing top with a spatula. 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). Cool cake: Let cool in pan on a wire rack 10 minutes. Using parchment overhangs, lift cake out of pan and let cool completely on rack. Make icing: Whisk together confectioners' sugar, butter, and orange juice until smooth. Spread over cake. Sprinkle with poppy seeds. Let set at least 20 minutes before serving. Storing Leftover Orange Sheet Cake Any leftovers should be stored in an air-tight container at room temperature. The cake will keep about three days. Other Orange Cake Recipes to Try Orange-Yogurt Cake Orange-Cardamom Bundt Cake Orange Chiffon Cake Orange Cornmeal Cake Orange Curd Cupcakes