Blackberry Buttermilk Cake

This was pretty simple to make and makes for a very pretty dessert. A great cake to bring to an event, as it doesn't fall apart or sweat if it isn't refrigerated, and also holds together quite well when sliced.

Ingredients
3/4 cup (1 1/2 sticks) unsalted butter, room temperature, plus more for pan and parchment
2 1/3 cups cake flour (sifted, then measured) plus more for pan
2 1/2 cups (10 ounces) fresh blackberries
1/4 cup plus 1 1/3 cups sugar
1 1/2 teaspoons baking powder
3/4 teaspoon salt
1/2 teaspoon baking soda
3 large eggs, room temperature
2 teaspoons vanilla extract
1 1/2 teaspoons finely grated orange zest
1 cup well-shaken buttermilk
Powdered sugar (for dusting)

Special equipment:  9"-10"-diameter springform pan

Directions;

Position a rack in middle of oven and preheat to 350°. Butter pan; line bottom with a round of parchment paper. Butter parchment. Dust with flour; tap out excess. Arrange berries in a single layer in bottom of pan; sprinkle evenly with 1/4 cup sugar.

Sift 2 1/3 cups flour, baking powder, salt, and baking soda into a medium bowl; set aside. Using an electric mixer, beat 3/4 cup butter and remaining 1 1/3 cups sugar in a large bowl at medium-high speed, occasionally scraping down sides of bowl, until pale and fluffy, about 2 minutes. Add eggs, one at a time, beating well after each addition. Beat in vanilla and zest. Reduce speed to low; beat in flour mixture in 3 additions, alternating with buttermilk in 2 additions, beginning and ending with flour mixture and beating just until incorporated. Pour batter over berries in pan; smooth top.

Bake until cake is golden brown and a tester inserted into the center comes out clean, about 1 hour. Let cool in pan set on a wire rack for 15 minutes, then run a thin, sharp knife around edge of pan to loosen. Remove pan sides. Invert cake onto rack and remove pan bottom; peel off parchment. Dust top generously with powdered sugar and let cool completely.

Tips:  I used two whole packages of blackberries, which was more than the recipe called for (about 16 oz instead of 10).  Most berries could be substituted here.  This cake is nice and light, and the orange zest really comes through in the flavor.  Serve with whipped cream for a summery treat!