Smash Cake Mini Matcha Birthday (Printable Version)

Light, fluffy mini matcha birthday cake with silky vanilla frosting — brunch-ready, festive, and easy to share.

# What You'll Need:

→ Matcha cake

01 - 3/4 cup all-purpose flour
02 - 1/2 cup granulated sugar
03 - 1/2 teaspoon baking powder
04 - 1/8 teaspoon baking soda
05 - 1/4 teaspoon fine salt
06 - 1 tablespoon culinary-grade matcha powder
07 - 1/3 cup whole milk, room temperature
08 - 1 large egg, room temperature
09 - 1/4 cup vegetable oil
10 - 1/2 teaspoon vanilla extract

→ Vanilla frosting

11 - 1/4 cup unsalted butter, softened
12 - 3/4 cup powdered sugar, sifted
13 - 1 tablespoon milk
14 - 1/2 teaspoon vanilla extract
15 - Pinch of salt

→ Optional toppings

16 - Sprinkles, as desired
17 - Fresh berries, as desired

# Directions:

01 - Preheat oven to 350°F. Grease and line two 4-inch round cake pans with parchment paper and set aside.
02 - In a medium bowl, sift or whisk together the flour, sugar, baking powder, baking soda, salt, and matcha until evenly distributed.
03 - In a separate bowl, whisk the milk, egg, vegetable oil, and vanilla until smooth and homogenous.
04 - Pour the wet mixture into the dry ingredients and gently fold with a spatula until just combined; stop when no streaks of flour remain to keep the crumb tender.
05 - Evenly divide the batter between the prepared pans, smoothing the tops with an offset spatula or the back of a spoon.
06 - Bake 15 to 20 minutes, rotating once if needed, until the centers spring back lightly and a toothpick inserted in the middle comes out clean.
07 - Let cakes rest in their pans for 5 minutes, then invert onto a wire rack and cool completely before icing to prevent melting the frosting.
08 - Beat the softened butter on medium speed until creamy. Gradually add the powdered sugar and beat until light and fluffy, then incorporate the milk, vanilla, and a pinch of salt until smooth and spreadable.
09 - Place one cake layer on a serving plate, spread a thin layer of frosting, top with the second layer, and apply a thin crumb coat all over. Chill briefly if needed, then finish with a final thin layer of frosting.
10 - Decorate with sprinkles or fresh berries as desired. Serve immediately for a playful smash presentation or slice to enjoy at brunch.

# Expert Advice:

01 -
  • This cake is as cheerful to assemble as it is to devour, and smashing it is oddly delightful.
  • The vibrant matcha flavor and creamy vanilla frosting make brunch feel like a special event.
02 -
  • I once overmixed the batter, and the cake turned out dense instead of airy—gentle folding is key.
  • Sifting the matcha with flour is the secret to that uniform, vibrant color and no bitter lumps.
03 -
  • To make slicing easier, chill the cake briefly before serving—even smash cakes benefit from a little structure.
  • A sprinkle of flaky sea salt on top elevates both flavor and presentation—just don't skip it.
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