This fluffy, moist Trader Joes Birthday Cake Recipe is made with vanilla bean paste and mascarpone cheese, ready in 50 minutes. Cutting into the soft sponge reveals a tender crumb cloaked in thick, airy Chantilly cream. I always rely on this copycat version when I need a guaranteed crowd-pleaser.
Why This Classic Works
I tried making this sheet cake several times before realizing the secret is mascarpone cheese in the frosting. Without it, the topping lacks that signature grocery store richness. The added fat stabilizes the cream while keeping it incredibly light.
Using vanilla bean paste instead of standard extract was another huge lesson. The visible vanilla flecks make it look and taste exactly like the beloved original.
Jump to RecipeTrader Joes Birthday Cake Recipe Ingredients
Cake Base
- 2 1/4 cups cake flour
- 1 1/2 cups granulated sugar
- 1/2 cup unsalted butter, softened
- 1/4 cup vegetable oil
- 3 large eggs, room temperature
- 1 cup buttermilk, room temperature
- 1 tablespoon vanilla bean paste
- 2 teaspoons baking powder
- 1/2 teaspoon salt
Chantilly Frosting
- 1 1/2 cups heavy whipping cream, cold
- 8 oz mascarpone cheese, cold
- 1 cup powdered sugar
- 1 teaspoon vanilla extract

How To Make Trader Joes Birthday Cake Recipe
- Prep The Equipment: Preheat oven to 350°F and grease a 9×13 inch baking pan, lining the bottom with parchment paper.
- Cream Butter And Sugar: Beat the butter, oil, and granulated sugar in a large bowl for 3 minutes until pale and fluffy.
- Add Wet Ingredients: Mix in the eggs one at a time, followed by the vanilla bean paste, scraping down the sides of the bowl.
- Combine With Dry Mix: Whisk the cake flour, baking powder, and salt in a separate bowl. Alternate adding dry ingredients and buttermilk to the butter mixture, ending with dry.
- Bake The Cake: Pour batter into the prepared pan and bake for 25-30 minutes until a toothpick inserted in the center comes out clean. Let it cool completely.
- Whip The Frosting: Beat the cold heavy cream, mascarpone, powdered sugar, and vanilla extract until stiff peaks form. Spread evenly over the cooled cake.

Recipe Tips
- Weigh your flour: Too much flour will make the cake dense rather than light and fluffy.
- Room temperature ingredients: Cold eggs and buttermilk will cause the batter to curdle and bake unevenly.
- Cold mascarpone: Keep the cheese and cream cold right until whipping so the Chantilly cream holds its shape.
What To Serve With Trader Joes Birthday Cake
This rich vanilla cake pairs wonderfully with fresh berries or a tart raspberry coulis to cut through the sweetness. A hot cup of dark roast coffee or Earl Grey tea also complements the creamy frosting perfectly.

How To Store
Keep the frosted cake in an airtight container in the refrigerator for up to 4 days. You can freeze the unfrosted cake layer wrapped tightly in plastic wrap for up to 3 months.
FAQs
- Can I use all-purpose flour instead of cake flour? Yes, but the crumb won’t be quite as tender. To make a substitute, replace two tablespoons of the all-purpose flour with cornstarch for every cup used.
- Why did my frosting separate? Over-whipping mascarpone can cause it to curdle and separate. Whip just until stiff peaks form and stop immediately.
- Can I make this as a layer cake? Absolutely. Divide the batter evenly between two 8-inch round cake pans and bake for 22-25 minutes.
Nutrition
- Calories: 410 kcal
- Total Fat: 24g
- Saturated Fat: 14g
- Cholesterol: 95mg
- Sodium: 210mg
- Total Carbohydrate: 45g
- Protein: 5g
Try More Recipes:
- Trader Joes Sheet Cake Hack Recipe
- Trader Joes Mochi Cake Recipe
- Trader Joes Protein Pancake Mix Recipe
Trader Joes Birthday Cake Recipe
12
servings20
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minutesFluffy, moist Trader Joes Birthday Cake Recipe packed with real vanilla bean paste and topped with rich mascarpone Chantilly cream. Ready in 50 minutes, this simple sheet bake is a guaranteed crowd-pleaser for your next weekend birthday celebration or casual gathering.
Ingredients
2 1/4 cups cake flour
1 1/2 cups granulated sugar
1/2 cup unsalted butter, softened
1/4 cup vegetable oil
3 large eggs, room temperature
1 cup buttermilk, room temperature
1 tablespoon vanilla bean paste
2 teaspoons baking powder
1/2 teaspoon salt
1 1/2 cups heavy whipping cream, cold
8 oz mascarpone cheese, cold
1 cup powdered sugar
1 teaspoon vanilla extract
Directions
- 1. *Prep The Equipment:* Preheat oven to 350°F and grease a 9×13 inch baking pan, lining the bottom with parchment paper.
- 2. *Cream Butter And Sugar:* Beat the butter, oil, and granulated sugar in a large bowl for 3 minutes until pale and fluffy.
- 3. *Add Wet Ingredients:* Mix in the eggs one at a time, followed by the vanilla bean paste, scraping down the sides of the bowl.
- 4. *Combine With Dry Mix:* Whisk the cake flour, baking powder, and salt in a separate bowl. Alternate adding dry ingredients and buttermilk to the butter mixture, ending with dry.
- 5. *Bake The Cake:* Pour batter into the prepared pan and bake for 25-30 minutes until a toothpick inserted in the center comes out clean. Let it cool completely.
- 6. *Whip The Frosting:* Beat the cold heavy cream, mascarpone, powdered sugar, and vanilla extract until stiff peaks form. Spread evenly over the cooled cake.
