Simple Moist Vanilla Cake Recipe

This moist vanilla cake recipe makes two 8 inch butter cake layers with sour cream and whole milk in the batter, finished with a fluffy vanilla buttercream. It takes about 1 hour of prep and baking, plus cooling, and serves 12. The method is old fashioned and reliable: cream the butter and sugar well, then add the flour in three parts, alternating with the milk and sour cream.

Butter gives the flavor, sour cream keeps the crumb soft for days, and the layers bake flat enough to stack without much trimming. I use it for birthdays and any time I need a plain cake that tastes of real vanilla.

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Two Layer Vanilla Cake by the Numbers

• Pans: two 8 inch round cake pans, greased, floured, and lined with parchment
• Oven: 350°F (175°C), 30 to 35 minutes
• Time: 25 minutes prep, 35 minutes baking, plus full cooling before frosting
• Serves: 12 slices
• Batter: 2½ cups (312g) flour, ¾ cup (170g) butter, 1¾ cups (350g) sugar, 4 eggs, 1 cup whole milk, ½ cup sour cream
• Buttercream: 1 cup (227g) butter to 4 cups (480g) powdered sugar, enough to fill, crumb coat, and cover the cake
• Make ahead: layers a day ahead, frosting in advance and re-whipped

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Room Temperature Dairy and a Long Creaming

Set out the butter, eggs, milk, and sour cream about an hour before you bake. Soft butter holds air, and room temperature eggs and dairy blend into it smoothly. Cold eggs make the butter seize, and the batter looks curdled. If that happens, keep beating for another minute or add a spoonful of the flour mixture, and it will come back together.

Beat the butter and sugar on medium speed for 3 to 4 minutes. It should turn pale, almost white, and look fluffy and bigger in the bowl. This is where the cake gets its lift, so do not cut it short. Add the eggs one at a time, beating well after each, then scrape down the bowl and mix in the vanilla.

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Why Sour Cream and Whole Milk Together

I stir whole milk and sour cream together for the liquid. Milk brings moisture and thins the batter enough to rise. Sour cream adds fat and a little acid, which tenderizes the crumb and works with the ½ teaspoon baking soda. Together they give a soft cake that still slices cleanly.

I have baked versions with only milk, and they tend to dome unevenly. With sour cream the batter relaxes in the pan and bakes into more even layers. I have also tried yogurt in its place, and the texture moved closer to a muffin than a cake, so I stick with sour cream here.

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Adding Flour and Liquid in Three Parts

Whisk the flour, baking powder, baking soda, and salt. Measure the flour by spooning it into the cup and leveling it, or weigh 312g. A scooped cup can hold far more flour, and that is the most common reason a vanilla cake turns out dry.

With the mixer on low, add a third of the flour mixture, then half the milk and sour cream, then flour, liquid, and the last of the flour. Starting and ending with flour keeps the batter from splitting. Stop the moment the flour disappears. The batter should be thick, smooth, and spreadable.

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Baking the 8 Inch Layers

Divide the batter evenly between the pans. Weighing each pan is the easiest way to get two layers that bake in the same time and stack level. Smooth the tops and bake at 350°F for 30 to 35 minutes.

Start checking at 30 minutes. The cake is done when a toothpick in the center comes out clean or with a dry crumb, the top springs back when pressed, and the edges pull away from the pan. Cool in the pans for 10 minutes, turn out onto a rack, and let the layers cool completely. Warm layers melt buttercream and the top layer slides.

For two 9 inch pans, the layers are thinner, so start checking at about 25 minutes. A 9×13 pan needs my vanilla sheet cake, which is written for that size and bake time.

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Dry, Domed, or Sunken Layers

• Sunken center: the cake was underbaked or the oven door opened before the middle set. Keep the door closed until the first check at 30 minutes.
• Tall dome or cracked top: the oven runs hot or the batter was overmixed. An oven thermometer helps, and a domed top can be leveled with a serrated knife.
• Dry crumb: too much flour or too long in the oven. Spoon and level the flour, and take the cake out as soon as the toothpick is clean.
• Dense, heavy layers: the butter and sugar were not creamed long enough, or the butter was too soft and greasy to hold air.

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Vanilla Buttercream for Filling and Frosting

Beat 1 cup of soft unsalted butter until creamy, then add the sifted powdered sugar one cup at a time on low speed so it does not cloud the kitchen. Add the vanilla, salt, and 2 tablespoons of cream or milk, then beat on high for 3 to 4 minutes until pale and fluffy.

If it is too stiff to spread, add more cream a tablespoon at a time. Add slowly, because too much makes it loose. This is an American style buttercream, so it forms a light crust after it sits for 15 minutes or so, which helps when you smooth the sides. When you want a less sweet, silkier finish, use my Swiss meringue buttercream instead.

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Butter or Oil for a Super Moist Vanilla Cake?

I have tested this recipe with both. Oil gives a moist cake right out of the oven, but it carries no flavor, and by the second day the crumb feels limp. Butter holds the shape and keeps a deep vanilla taste.

The sour cream is what lets butter win here. It keeps the crumb tender without making it greasy, and slices stay soft even after a night in the fridge.

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Leveling, Crumb Coating, and Storing the Cake

Level the cooled layers with a serrated knife if they domed. Set one layer on a stand, spread a generous layer of buttercream, and place the second layer on top, pressing lightly. Spread a thin crumb coat over the whole cake and chill it for 15 minutes, until the frosting feels firm to the touch. Then add the final coat and smooth it with an offset spatula.

The frosted cake keeps at room temperature for up to 2 days in a cool kitchen. In a warm kitchen, refrigerate it and let it sit out for 30 minutes before serving so the butter softens. Wrap leftover slices in parchment and keep them in an airtight container. To get ahead, bake the layers a day early and wrap them tightly once cool. Slightly chilled layers are easier to level and frost.

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Fillings, Flavors, and Ways to Serve It

Served plain with fresh berries or a spoon of lightly sweetened cream, it needs nothing else. To fill the cake, spread strawberry cake filling or raspberry cake filling inside a ring of buttercream so it does not squeeze out. My strawberry vanilla cake is built on the same idea.

To change the flavor, swap the vanilla for almond extract and frost with dark chocolate buttercream. The layers are sturdy, and I have used them for shaped cakes like my Minecraft cake. If you want something richer, try my chocolate mousse cake.

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Vanilla Layer Cake Questions

Can I make this vanilla cake without sour cream?

You can replace the sour cream with more whole milk, but the cake will be less tender and more likely to dome. Plain yogurt works, though the crumb turns more like a muffin.

Can I freeze the cake layers?

Yes. Wrap each cooled layer tightly in plastic wrap and then foil, and freeze for up to a month. Thaw in the wrapping so the condensation does not land on the cake.

Why is my vanilla cake yellow and not white?

Whole eggs and butter give a pale golden crumb. A white cake uses only egg whites, which changes the texture as well as the color.

If you bake it, tell me in the comments how you filled and frosted it.