Buttermilk Cake with Mascarpone and Berries

I've mentioned a million times that I'm not really a cake person but I saw this particular beauty in the most recent issues of Gourmet and I HAD to try it. It is simple and elegant and downright delicious. I made a few changes-namely, I had no sherry so I just macerated the berried with sugar. Also, since I was using blueberries and I ADORE the flavor combination of blueberry and lemon, I zested a lemon into the cake batter and it was really phenomenal. One mistake I made though was when I added the buttermilk, the batter looked like it was curdling a bit. This freaked me out so I kept beating until smooth. I tasted my mistake in the ever-so-slightly tough texture of the cake. Moral of the story; don't be afraid of the buttermilk and only mix to combine ingredients completely and no more.

For cake:
2 cups sifted cake flour (not self-rising; sift before measuring)
1 teaspoon baking powder
1 teaspoon baking soda
1/2 teaspoon salt
1 stick unsalted butter, softened
1 cup sugar
1 teaspoon pure vanilla extract
2 large eggs
1 cup well-shaken buttermilk

For berries:
1/2 cup Fino (dry) Sherry
1/2 cup sugar
4 cups mixed berries, cut if large

For cream:
8 ounces mascarpone (1 cup)
1 cup chilled heavy cream
1/4 cup sugar

Garnish: confectioners sugar

PreparationMake cake:
Preheat oven to 350°F with rack in middle. Butter a 9-inch round cake pan (2 inches deep). Line bottom with a round of parchment paper, then butter parchment.

Sift together flour, baking powder, baking soda, and salt.

Beat together butter and sugar in a large bowl with an electric mixer until pale and fluffy. Beat in vanilla. Add eggs 1 at a time, beating well after each addition. With mixer at low speed, beat in buttermilk until just combined. Add flour mixture in 3 batches, mixing after each addition until just combined.

Spread batter in cake pan, smoothing top. Rap pan on counter several times to eliminate air bubbles.

Bake until golden and a wooden pick inserted in center comes out clean, 35 to 40 minutes. Cool in pan on a rack 10 minutes. Run a knife around edge of cake to loosen, then invert onto a plate. Discard paper and reinvert cake onto rack to cool completely.

Macerate berries:
Bring Sherry and sugar to a boil in a small heavy saucepan, stirring until sugar has dissolved. Put berries in a bowl and pour hot syrup over them, gently tossing to coat. Let stand 15 minutes. make cream and assemble cake: Beat mascarpone and cream with sugar in a large bowl using cleaned beaters until mixture just holds stiff peaks.

Halve cake horizontally with a long serrated knife. Carefully remove top half and reserve. Put bottom half on a plate, then spread evenly with all of cream and replace top half. Serve with berries.

Cooks notes:
•Cake, without cream, can be baked 1 day ahead. Wrap in plastic wrap once cool and keep at room temperature. •Berries can macerate at room temperature up to 2 hours.