Dairy-Free Birthday Cake
A classic dairy-free yellow birthday cake with tender vanilla layers, dairy-free milk, dairy-free butter, a little oil for moisture, and fluffy dairy-free vanilla buttercream. It is built like a real celebration cake, just without the dairy.
Recipe by Non Dairy Dude
Dude Note
Nobody should have to pass on birthday cake. This is a real funfetti celebration cake first and a dairy-free cake second: tender layers, fluffy vanilla buttercream, and plenty of sprinkles. Make it for someone who is tired of being handed the fruit plate while everyone else gets cake.
This recipe uses: Dairy-Free Vanilla Buttercream Frosting
Ingredients
Cake
- 1 cupUnsweetened oat milk or soy milk, room temperature
- 1 tbspApple cider vinegar or lemon juice
Dry Ingredients
- 2½ cupsAll-purpose flour
- ¼ cupCornstarch
- 2½ tspBaking powder
- ¼ tspBaking soda
- 1 tspFine salt
Batter
- ½ cupDairy-free butter sticks, softened
- ¼ cupNeutral oil
- 1½ cupsGranulated sugar
- 3 largeLarge eggs, room temperature
- 1 largeLarge egg yolk, room temperature
- 1 tbspVanilla extract
Assembly
- 1½ batchesDairy-free vanilla buttercream frosting
- ½ cupDairy-free rainbow sprinkles, plus more for decorating
Instructions
- 1
Heat the oven to 350 F. Grease two 8-inch round cake pans, line the bottoms with parchment, and lightly flour the sides or use dairy-free baking spray.
- 2
Stir together the dairy-free milk and vinegar or lemon juice. Let stand for 5 minutes while you measure the dry ingredients.
- 3
In a medium bowl, whisk together the flour, cornstarch, baking powder, baking soda, and salt.
- 4
In a large bowl or stand mixer, beat the dairy-free butter, oil, and sugar on medium speed for 3 minutes, until fluffy and lighter. Scrape down the bowl.
- 5
Beat in the eggs and egg yolk one at a time, mixing well after each addition. Beat in the vanilla.
- 6
Add one-third of the dry ingredients and mix on low just until combined. Add half of the dairy-free milk mixture, then another third of the dry ingredients, the remaining milk mixture, and the remaining dry ingredients. Mix only until the batter is smooth.
- 7
Fold in the sprinkles gently with a spatula, using as few strokes as possible so the colors do not bleed through the batter.
- 8
Divide the batter evenly between the prepared pans and smooth the tops. Bake for 28 to 32 minutes, until the cakes spring back lightly and a toothpick inserted in the center comes out clean or with a few moist crumbs.
- 9
Cool the cakes in the pans for 15 minutes, then turn out onto a rack, remove the parchment, and cool completely before frosting.
- 10
Place one cake layer on a plate or cake stand. Spread a generous layer of dairy-free vanilla buttercream over the top. Add the second layer, then frost the top and sides with the remaining buttercream.
- 11
Decorate with more sprinkles. For cleaner slices, chill the frosted cake for 20 to 30 minutes before cutting, then let slices sit at room temperature for a few minutes before serving.
Dairy Substitutions Used
Classic birthday cake usually relies on milk, butter, and dairy-based frosting. This dairy-free version uses unsweetened oat milk or soy milk soured with vinegar for tenderness, dairy-free butter sticks for vanilla cake flavor, a small amount of neutral oil for moisture, and dairy-free vanilla buttercream for the frosted finish.
Tips & Variations
Use room-temperature ingredients: Dairy-free butter, eggs, and dairy-free milk mix more evenly when they are not cold. This helps the cake bake with a finer, softer crumb.
Oat milk or soy milk work best: Both have enough body for cake batter. Thin almond milk can work, but the cake may be slightly less tender.
Why both butter and oil: Dairy-free butter gives classic birthday-cake flavor, while oil keeps the crumb moist. Using only dairy-free butter can make the cake firmer after chilling.
Cornstarch softens the crumb: It mimics some of the tenderness of cake flour while keeping the ingredient list pantry-friendly.
Check the sprinkles: Most sprinkles are dairy-free, but some specialty blends contain confectioner's glaze, milk-derived ingredients, or shared-line warnings. Use what fits your needs.
Fold sprinkles gently: Overmixing after adding sprinkles can streak the batter and muddy the colors.
Cool completely before frosting: Even slightly warm cake will melt dairy-free buttercream faster than dairy buttercream. Patience saves the frosting job.
Frosting amount: One and a half batches of dairy-free vanilla buttercream gives enough for filling, sides, top, and a few decorative swirls. Use one batch for a thinner, more casual frosting layer.
Make ahead: Bake the cake layers 1 day ahead, wrap well, and keep at room temperature. Frost the day you plan to serve.
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