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Sour Cream Vanilla Cake with Strawberry Frosting

Sour Cream Vanilla Cake with Strawberry Frosting

Introduction

Have you ever wondered why bakery vanilla cake has that soft, plush texture? The answer is often sour cream. This Sour Cream Vanilla Cake with Strawberry Frosting is a celebration of that simple trick. The cake stays incredibly moist and tender, while the strawberry frosting adds a creamy, fruity finish that feels both nostalgic and fresh. Whether you need a big sheet cake for a party or a smaller cake for family dessert, this recipe gives you clear measurements for two pan options. It is straightforward enough for a beginner but delivers the kind of rich flavor that makes people ask for the recipe.

Ingredients

For the cake

Choose the ingredient amounts based on your pan size.

For an 18 by 13 inch sheet pan:

2¼ sticks (18 tbsp) butter, room temperature
2½ cups sugar
3 large eggs
2½ tsp vanilla extract
¾ cup milk
1 cup sour cream
3 cups all-purpose flour
3 tsp baking powder
1 tsp salt

For a 9 by 13 inch pan or two 8 inch round pans:

1½ sticks (12 tbsp) butter, room temperature
1½ cups sugar
3 large eggs
2 tsp vanilla extract
½ cup milk
¾ cup sour cream
2 cups all-purpose flour
2 tsp baking powder
½ tsp salt

For the strawberry frosting

For an 18 by 13 inch cake:

1 cup frozen strawberries, thawed
3 sticks (1½ cups) butter, room temperature
½ tsp salt
6–7 cups powdered sugar
1 tsp vanilla extract

For a 9 by 13 inch cake:

½ cup frozen strawberries, thawed
2 sticks (1 cup) butter, room temperature
½ tsp salt
3½ cups powdered sugar
1 tsp vanilla extract

Ingredient tips and substitutions

Let the butter, eggs, milk, and sour cream come to room temperature before you start. Room temperature ingredients blend more evenly and create a lighter crumb. Full-fat sour cream gives the best texture, but plain Greek yogurt works as a substitute in equal measure. For the strawberry frosting, you can use fresh strawberries instead of frozen. If your fresh berries are very juicy, start with a little less puree and add it gradually. A pinch of lemon zest in the frosting can brighten the strawberry flavor.

Step-by-Step Instructions

Preheat the oven to 350°F (175°C). Grease your pan generously with butter or nonstick spray. If you are using round pans, line the bottoms with parchment paper for easy release.
Beat the butter and sugar in a large mixing bowl until light and fluffy. This usually takes about three to four minutes with an electric mixer. The mixture should look pale and creamy.
Add the eggs one at a time, mixing well after each addition. Scrape down the sides of the bowl so everything incorporates evenly.
Mix in the vanilla, milk, and sour cream. The batter may look slightly curdled because of the sour cream, but that is normal. It will smooth out when you add the dry ingredients.
In a separate bowl, whisk together the flour, baking powder, and salt. Whisking helps distribute the leavening agent and salt evenly through the batter.
Gradually add the dry ingredients to the wet mixture. Mix just until combined and no dry streaks remain. Overmixing can make the cake tough, so stop as soon as the flour disappears.
Pour the batter into the prepared pan and spread it into an even layer. A small offset spatula works well for this.
Bake until a toothpick inserted in the center comes out mostly clean and the edges begin to pull away from the pan. For an 18 by 13 inch sheet pan, bake for 18 to 25 minutes. For a 9 by 13 inch pan or two 8 inch rounds, bake for 25 to 30 minutes.
Let the cake cool completely before frosting. A warm cake will melt the strawberry buttercream and make it slide off.

For the strawberry frosting

Blend the thawed strawberries into a smooth puree. You can use a small blender or food processor. Strain the puree through a fine mesh sieve if you want to remove the seeds.
Beat the butter and salt until light and fluffy. This takes about two minutes.
Gradually add the powdered sugar, one cup at a time, mixing on low speed so the sugar does not fly everywhere. Once all the sugar is incorporated, increase the speed and beat until smooth.
Add the vanilla, then slowly mix in the strawberry puree. For the 18 by 13 inch cake, start with ½ cup puree and add more as needed. For the 9 by 13 inch cake, start with ¼ cup and add more if needed.
Beat the frosting until it is smooth, fluffy, and spreadable. If it feels too thick, add a tiny splash of milk or extra strawberry puree. If it is too thin, add more powdered sugar a little at a time.

Nutritional Information

These numbers are approximate and based on a 9 by 13 inch cake cut into 15 slices.

Serving size: 1 slice
Calories: 580
Protein: 4 g
Carbohydrates: 82 g
Fat: 26 g
Fiber: 1 g

The exact values will vary depending on the type of butter, sour cream, and the amount of frosting you use.

Preparation Time

Prep time: 20 minutes
Cook time: 25 to 30 minutes for a 9 by 13 inch pan, or 18 to 25 minutes for an 18 by 13 inch sheet pan
Total time: 50 minutes plus cooling and frosting time

For round pans, expect the same timing as the 9 by 13 inch pan. The sheet cake bakes faster because the batter is spread thinner.

Healthier Alternatives

This Sour Cream Vanilla Cake with Strawberry Frosting is a treat, but you can make a few swaps if you want a lighter version.

Replace half of the all-purpose flour with white whole wheat flour or whole wheat pastry flour.
Swap one-third of the butter in the cake with unsweetened applesauce to reduce fat.
Use plain Greek yogurt instead of sour cream for a slight protein boost.
Reduce the sugar in the cake by ¼ cup without changing the texture dramatically.
For a lighter frosting, use half butter and half whipped cream cheese, then add powdered sugar to taste.
For a vegan option, use plant-based butter, dairy-free sour cream, and a flax egg substitute. Use a good dairy-free milk alternative.
For a gluten-free version, replace the all-purpose flour with a 1:1 gluten-free baking flour blend.

Serving Suggestions

This moist vanilla sheet cake pairs beautifully with fresh berries and a dusting of powdered sugar. You can also top it with sliced strawberries, edible flowers, or a drizzle of lemon glaze for extra brightness.

For a more indulgent dessert, serve each slice with a small scoop of vanilla ice cream or a dollop of lightly sweetened whipped cream. A spoonful of strawberry preserves on the plate adds extra fruitiness.

Drink pairings include cold milk, hot coffee, black tea, or a sparkling water with lime. If you are serving adults, a dry rosé or a light sparkling wine complements the strawberry flavor without being too heavy.

Common Mistakes to Avoid

Using cold ingredients can make the batter curdle and the cake dense. Let everything warm up first.
Overmixing the batter develops too much gluten, which makes the vanilla cake tough instead of tender.
Overbaking is the fastest way to dry out this moist cake. Start checking for doneness a few minutes before the recommended time.
Frosting a warm cake will melt the strawberry buttercream. Let the cake cool completely on a wire rack.
Adding too much strawberry puree at once can make the frosting runny. Add it gradually and stop when you like the consistency.
Skipping the salt in the frosting can make it taste flat. A little salt balances the sweetness and enhances the berry flavor.

Storage Tips

Refrigerate the frosted Sour Cream Vanilla Cake with Strawberry Frosting in an airtight container for up to four days. The butter in the frosting will firm up in the fridge, so let a slice sit at room temperature for about 15 minutes before serving.

You can freeze the unfrosted cake for up to three months. Wrap it tightly in plastic wrap and then aluminum foil. Thaw it in the refrigerator overnight before frosting. The strawberry frosting can also be frozen separately in an airtight container for up to two months. Thaw it in the fridge, then beat it again to restore a fluffy texture.

To reheat individual slices, use a microwave at 50 percent power in short bursts. Be careful not to melt the frosting. Many people enjoy this cake cold directly from the fridge, especially in warm weather.

Conclusion

This Sour Cream Vanilla Cake with Strawberry Frosting is the kind of dessert that feels both classic and special. The sour cream keeps the vanilla base rich and tender, while the strawberry buttercream adds a naturally pink, fruity finish. The flexible pan sizes make it perfect for birthdays, potlucks, or a quiet weekend baking project.

I would love to hear how your cake turns out. Leave a comment below and share your experience, your favorite substitutions, or any questions you have.

Frequently Asked Questions

Can I use fresh strawberries instead of frozen?

Yes. Fresh strawberries work just as well. Hull and blend them into a smooth puree. If your fresh berries are very juicy, start with a little less puree than the recipe calls for and adjust as needed.

Why is my strawberry frosting runny?

This usually happens when too much strawberry puree is added at once or the butter is too warm. Add the puree slowly and stop when the frosting is spreadable. If it becomes runny, chill the bowl for 10 minutes and then beat again. You can also add more powdered sugar to thicken it.

Can I make this cake in round pans?

Yes. The ingredient list includes measurements for two 8 inch round pans. Grease and line the pans, then bake for 25 to 30 minutes. Let the layers cool completely before stacking and frosting.

Can I reduce the sugar in the frosting?

You can reduce the powdered sugar slightly, but keep in mind that powdered sugar also gives the frosting structure and stability. Use a little less sugar and add a pinch more salt to balance the sweetness. A cream cheese frosting base also allows you to use less sugar while keeping a thick texture.

Is there a dairy-free version of this recipe?

Yes. Use plant-based butter, dairy-free sour cream or a thick coconut yogurt, and a dairy-free milk alternative. For the frosting, use a vegan butter stick. The texture will be slightly different, but the cake will still be moist and flavorful.

Can I make this cake ahead of time?

Yes. Bake the cake a day ahead, let it cool completely, and wrap it tightly. Store it at room temperature if unfrosted. You can also make the strawberry frosting a day ahead and refrigerate it. Bring the frosting to room temperature and beat it again before spreading.

What if I do not have sour cream?

Plain full-fat Greek yogurt is the best substitute. Use the same amount. In a pinch, you can use buttermilk, but the cake may be slightly less rich. Avoid using low-fat yogurt, as it can add too much moisture.

How do I get clean slices when serving?

Use a sharp knife and wipe it clean between cuts. If the cake is refrigerated, the frosting will be firm and easier to slice. For a softer frosting, let the whole cake sit at room temperature for 10 minutes before cutting.