This easy coconut cake recipe makes a tender, moist 9-by-13-inch dessert with a boxed white or yellow cake mix, sour cream, coconut extract, and sweetened shredded coconut. The cake takes only 15–20 minutes to prepare, bakes in 28–35 minutes, and is finished with a creamy homemade cream-cheese frosting.
Every bite brings together soft vanilla cake, rich coconut flavor, chewy shreds of coconut, and a tangy-sweet frosting. Because it serves 12–16 people and can be made in one pan, this is a practical fruit-inspired dessert for birthdays, potlucks, holidays, family dinners, and relaxed weekend baking.
This cake is designed for busy bakers who want a homemade-looking dessert without measuring a long list of dry ingredients. A boxed cake mix provides a dependable base, while sour cream adds moisture and a soft, delicate crumb that stays pleasant after refrigeration.
The coconut flavor comes from three simple touches: coconut extract in the batter, shredded coconut folded into the cake, and a coconut topping over the frosting. The result is flavorful without requiring fresh coconuts, special equipment, or complicated decorating skills.
It is also an excellent make-ahead dessert. Bake the cake in the same pan you will use for serving, cool it completely, frost it, and keep it covered in the refrigerator until it is time to cut and serve.
If you enjoy fruit-forward cakes with a simple preparation, you may also like this easy fruit cake idea for another colorful dessert option.
Ingredients You’ll Need
The cake batter uses familiar ingredients, but each one contributes to the final texture and flavor. Gather everything before mixing so the batter can be prepared quickly and evenly.
Cake mix: Use one 15.25-ounce box of white or yellow cake mix.
Eggs: Three large eggs help bind the batter and create a tender structure.
Sour cream: One cup of full-fat sour cream adds richness and moisture.
Oil: One-half cup of neutral vegetable oil keeps the crumb soft.
Coconut flavor: One teaspoon of coconut extract gives the cake a clear coconut note.
Liquid: Use one-half cup of water or coconut milk, following the cake mix package directions.
Shredded coconut: One cup goes into the batter and another cup is reserved for the topping.
The frosting is a classic cream-cheese mixture made with softened cream cheese, unsalted butter, powdered sugar, vanilla, and a little milk or heavy cream. The optional one-half teaspoon of coconut extract makes the frosting taste more tropical, but the frosting is still delicious without it.
How to Make It Step-by-Step
Step 1: Heat the oven to 350°F (175°C), then grease a 9-by-13-inch baking pan thoroughly. If you want especially easy serving and cleanup, line the bottom with parchment while leaving the sides greased.
Step 2: Add the cake mix, eggs, sour cream, vegetable oil, coconut extract, and one-half cup of water or coconut milk to a large mixing bowl. Beat for about 1–2 minutes, just until the batter is smooth and no dry pockets remain.
Step 3: Fold one cup of sweetened shredded coconut into the batter with a spatula. Folding distributes the coconut without overmixing, which helps preserve the cake’s soft texture.
Step 4: Pour the batter into the prepared pan and spread it into an even layer. Pay attention to the corners so the cake bakes at the same rate from edge to edge.
Step 5: Bake for 28–35 minutes. The cake is ready when the center springs back lightly and a toothpick inserted into the middle comes out clean or with a few moist crumbs.
Step 6: Set the pan on a cooling rack and let the cake cool for about 10 minutes in the pan. Continue cooling until the cake is completely at room temperature, because frosting a warm cake can make the frosting melt and slide.
Step 7: Make the frosting by beating the softened cream cheese and butter until smooth. Gradually add 3–4 cups of powdered sugar, then beat in the vanilla and optional coconut extract.
Step 8: Add 2–3 tablespoons of milk or heavy cream a little at a time until the frosting reaches a smooth, spreadable consistency. Use less liquid for a thicker frosting and more when needed to make spreading easier.
Step 9: Spread the frosting over the fully cooled cake, reaching gently into the corners. Sprinkle the reserved one cup of shredded coconut over the top, pressing it lightly into the frosting so it stays in place when the cake is sliced.
Step 10: If you prefer a deeper coconut flavor and crisp texture, toast the topping at 325°F (165°C) for about 5–8 minutes before using it. Watch it closely because shredded coconut can change from pale to browned quickly.
Pro Tips for a Moist Coconut Cake
Room-temperature eggs blend more evenly with the sour cream and oil, so take them out of the refrigerator before you begin. Full-fat sour cream is also the best choice for the moist, tender crumb intended in this recipe.
For a stronger coconut profile, replace the water with one-half cup of unsweetened coconut milk and use coconut extract in both the cake and frosting. Do not pour in additional coconut milk on top of the listed liquid, since extra liquid may make the cake dense.
When measuring powdered sugar, loosen it with a spoon before adding it to the measuring cup. Add it gradually to the frosting so you can control sweetness and keep the mixture smooth instead of creating a cloud of sugar in the kitchen.
If the frosting feels too soft to spread, refrigerate it briefly before applying it. The finished cake can also be chilled for a short time after frosting, which helps the topping set neatly.
For a different coconut dessert with a lighter presentation, see this coconut cloud cake when you want another recipe for your baking list.
Serving and Garnish Ideas
Cut the cake into 12 large pieces or 16 smaller squares, depending on the occasion. A small serrated knife works well for clean cuts through the frosting and coconut topping, especially after the cake has chilled.
Serve each piece cold or let it sit at room temperature briefly before eating. The chilled version has a firm, creamy frosting, while a short rest allows the cake crumb to feel softer and lets the coconut aroma come forward.
To keep the decoration simple, use shredded coconut as the only topping. Toasted coconut provides a pleasant contrast to the smooth frosting, while untoasted coconut keeps the cake pale, soft, and classic.
This dessert also fits festive menus alongside spiced pastries and celebration cakes. For another party-friendly option, you can browse this easy king cake recipe for a colorful occasion dessert.
Storage and Make-Ahead Instructions
Because the frosting contains cream cheese, store the finished cake covered in the refrigerator. It is best kept in the baking pan with a snug cover or transferred carefully to an airtight cake container.
The cake needs about 45–60 minutes for cooling and frosting after baking, so plan on an overall preparation window of about 1 hour 30 minutes. If making it ahead, bake and cool it completely before frosting, then refrigerate it until serving.
Keep the cake covered to protect the soft crumb from refrigerator odors and prevent the coconut topping from drying out. If the frosting becomes very firm, allow the cake to stand briefly before slicing so the texture is easier to enjoy.
Easy Coconut Cake Recipe
A moist boxed-mix coconut cake is mixed with sour cream and shredded coconut, then topped with a smooth cream-cheese frosting and more coconut. It is an easy 9-by-13-inch dessert that serves 12–16 people.
Heat the oven to 350°F (175°C). Grease a 9-by-13-inch baking pan and line the bottom with parchment if desired.
Combine the cake mix, eggs, sour cream, oil, coconut extract, and water or coconut milk in a large bowl. Beat until smooth, about 1–2 minutes.
Fold 1 cup of sweetened shredded coconut into the batter. Spread the batter evenly in the prepared pan.
Bake for 28–35 minutes, until the center springs back lightly and a toothpick inserted in the middle comes out clean or with a few moist crumbs.
Cool the cake in the pan for about 10 minutes, then let it cool completely before frosting.
Beat the softened cream cheese and butter until smooth. Gradually beat in the powdered sugar, then mix in the vanilla and optional coconut extract.
Add milk or heavy cream a little at a time until the frosting is smooth and spreadable. Spread it over the cooled cake and sprinkle the remaining shredded coconut on top.
For toasted coconut, bake it at 325°F (165°C) for about 5–8 minutes before sprinkling it over the frosting. Refrigerate briefly if the frosting is soft, then cover and store the finished cake in the refrigerator.
Notes
Use full-fat sour cream and room-temperature eggs for the most tender texture. For a stronger coconut taste, use unsweetened coconut milk instead of water and add coconut extract to both the cake and frosting. Do not add extra coconut milk without reducing another liquid, or the cake may become dense.
Final Thoughts
This easy coconut cake recipe delivers the comfort of a classic homemade dessert with the convenience of a boxed cake mix. Sour cream keeps the cake moist, coconut extract builds a clear tropical flavor, and shredded coconut adds gentle chewiness throughout the soft crumb.
The cream-cheese frosting balances the sweetness with a mild tang, while the coconut topping gives every square a pretty finish without demanding advanced decorating. It is a dependable choice for serving 12–16 guests at a potluck, holiday gathering, birthday table, or family meal.
For the best result, use room-temperature eggs, full-fat sour cream, and a fully cooled cake before frosting. Whether you choose plain or toasted coconut on top, this simple one-pan dessert is ready to become a favorite whenever you want a moist, fruit-inspired cake with very little fuss.
