Costco-Style Vanilla Cake

Soft, fluffy, and layered with smooth vanilla buttercream — this classic bakery-style cake is rich, tender, and perfect for birthdays, celebrations, or large event gatherings.

📝 Ingredients

For the Vanilla Cake
2½ cups all-purpose flour
2½ teaspoons baking powder
½ teaspoon salt
1 cup unsalted butter, softened
1½ cups granulated sugar
4 large eggs
1 tablespoon vanilla extract
1 cup whole milk (room temperature)
½ cup sour cream (room temperature)

For the Vanilla Buttercream Frosting


1½ cups unsalted butter, softened
4–5 cups powdered sugar
2–3 tablespoons heavy cream or milk
1 tablespoon vanilla extract
Pinch of salt

👩‍🍳 Instructions

1️⃣ Prepare the Pans

Preheat oven to 175°C (350°F). Grease and line two 8-inch round cake pans with parchment paper.

2️⃣ Mix the Dry Ingredients

In a bowl, whisk together flour, baking powder, and salt. Set aside.

3️⃣ Cream Butter & Sugar

In a large mixing bowl, beat softened butter and sugar until light and fluffy. This step creates that classic bakery-style texture.

4️⃣ Add Eggs & Vanilla

Add eggs one at a time, mixing well after each addition. Stir in vanilla extract

5️⃣ Combine Wet & Dry

Alternate adding the dry ingredients and milk to the butter mixture, beginning and ending with the dry ingredients. Mix gently until just combined. Fold in sour cream until smooth.

6️⃣ Bake

Divide batter evenly between prepared pans and smooth the tops. Bake for 28–35 minutes, or until a toothpick inserted in the center comes out clean.

Cool cakes in pans for 10–15 minutes, then transfer to a wire rack to cool completely.

7️⃣ Make the Buttercream

Beat butter until creamy. Gradually add powdered sugar, mixing well. Add vanilla, salt, and cream. Beat until light and fluffy. Adjust consistency with more cream if needed.

8️⃣ Assemble

Place one cake layer on a board and spread frosting evenly over the top. Add the second layer and frost the top and sides smoothly for that signature wholesale bakery finish.

Chill slightly before slicing for clean, sharp cuts.

This cake is soft, rich, and beautifully classic — perfect for birthdays, parties, or any celebration that calls for a timeless vanilla centerpiece 🤍✨

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