Classic Buttermilk Cake with Vanilla Buttercream Frosting – The Ultimate Homemade Birthday Cake
My daughter’s birthday was last weekend, and I’m pretty sure half this cake disappeared before we even sang “Happy Birthday.” She kept sneaking back into the kitchen with that guilty little smile, and I couldn’t even be mad — I’d already had two slices myself.
There’s something about a classic buttermilk cake that just feels like home. It’s incredibly tender, buttery, and impossibly soft — the kind of cake that practically melts on your tongue. Paired with thick, creamy vanilla buttercream, it’s pure comfort in every bite. This isn’t a fancy bakery cake. It’s the heartfelt, made-with-love kind that everyone remembers.
The buttermilk gives it that signature moist crumb and slight tang that balances the sweetness perfectly. No complicated techniques or weird ingredients — just simple, from-scratch baking that turns out beautifully every time. It’s become our go-to recipe for birthdays, celebrations, and weekend treats the whole family begs for.
Ingredients
For the Cake:
- 1 cup (2 sticks) unsalted butter, softened
- ½ cup vegetable shortening (or substitute with more butter)
- 3 cups granulated sugar
- 5 large eggs, room temperature
- 3 cups all-purpose flour
- ½ teaspoon baking powder
- ¼ teaspoon salt
- 1 cup buttermilk, room temperature
- 1 tablespoon vanilla extract
For the Vanilla Buttercream Frosting:
- 1 cup (2 sticks) unsalted butter, softened
- 4–5 cups powdered sugar
- 3–4 tablespoons heavy cream or milk
- 2 teaspoons vanilla extract
- Pinch of salt
Instructions
- Preheat your oven to 325°F (165°C). Grease and flour three 8-inch round cake pans (or two 9-inch pans).
- In a large bowl, cream together the butter, shortening, and sugar until light and fluffy — about 4 minutes.
- Add the eggs one at a time, beating well after each addition.
- In a separate bowl, whisk together the flour, baking powder, and salt.
- Add the dry ingredients to the butter mixture in three parts, alternating with the buttermilk. Begin and end with the flour mixture. Mix just until combined — do not overmix.
- Stir in the vanilla extract.
- Divide the batter evenly between the prepared pans and smooth the tops.
- Bake for 30–35 minutes, or until a toothpick inserted in the center comes out clean and the edges start to pull away from the sides.
- Cool the cakes in the pans for 10 minutes, then turn them out onto a wire rack to cool completely.
- While the cakes cool, make the frosting: Beat the butter until creamy. Gradually add the powdered sugar one cup at a time. Add the heavy cream, vanilla, and salt. Beat on high speed for about 3 minutes until light and fluffy.
- Once the cakes are completely cool, stack, fill, and frost. Embrace the rustic swirls — they’re part of the homemade charm.
Slice generously and watch it disappear. That first piece rarely makes it to a plate!
Would you keep it classic vanilla or try a different frosting flavor? Let me know in the comments!
Classic Buttermilk Cake with Vanilla Buttercream Frosting
Ingredients
Equipment
Method
- Preheat oven to 325°F. Grease and flour cake pans.
- Cream butter, shortening, and sugar until light and fluffy (4 minutes).
- Add eggs one at a time, beating well after each.
- Whisk dry ingredients together. Alternate adding dry ingredients and buttermilk to the butter mixture, starting and ending with flour. Mix until just combined.
- Stir in vanilla. Divide batter evenly into pans.
- Bake 30–35 minutes until toothpick comes out clean. Cool 10 minutes in pans, then on wire rack.
- For frosting: Beat butter until creamy. Gradually add powdered sugar, then cream, vanilla, and salt. Beat on high until fluffy.
- Stack cooled cakes and frost as desired.
Notes
Storage: Keep covered at room temperature for 2 days or refrigerate up to 5 days. Bring to room temp before serving.
Variations: Add lemon zest to the batter or try chocolate buttercream for a fun twist.
Perfect for: Birthday parties, family gatherings, and special homemade desserts.