01 -
Preheat the oven to 175°C. Butter and flour two 20-centimeter round cake pans to prevent sticking.
02 -
Combine flour, baking powder, and salt, then sift together into a bowl. Set aside.
03 -
In a stand mixer, beat the unsalted butter and granulated sugar on medium speed until pale and fluffy, about 2 to 3 minutes.
04 -
Add eggs one at a time, allowing 15 seconds between each addition, followed by the vanilla extract. Reduce mixer speed to low.
05 -
Add the sifted dry ingredients and milk to the mixture in alternating additions, beginning and ending with the dry ingredients. Mix until just combined; avoid overworking the batter.
06 -
Pour the batter evenly between the prepared pans. Gently smooth the tops with a spatula. Bake for 25 to 30 minutes, or until a toothpick inserted in the center emerges clean.
07 -
Allow cakes to cool completely in pans before turning out onto a rack. Once cooled, spread the classic buttercream frosting evenly over the layers.