How to Make It
Preheat the oven to 350°. Butter and flour two 9-inch cake pans. On a sheet of wax paper, sift the flour, baking powder, baking soda and salt.
In a large bowl, using an electric mixer, beat the butter at medium speed until creamy. Beat in the sugar until fluffy, about 2 minutes. Add the eggs, 1 at a time, beating well between additions. Beat in the dry ingredients at low speed, in 3 additions, alternating with the buttermilk. Beat in the vanilla.
Spoon the batter into the prepared pans and bake in the center of the oven for about 35 minutes, until golden and a cake tester inserted in the centers comes out clean. Let the cakes cool on a rack for 10 minutes. Unmold the cakes and let cool completely on the rack.
Transfer a cake layer to a plate and frost the top generously with icing. Cover with the second cake layer and spread the top and sides with the remaining icing. Decorate with dragées and serve.