Ingredients

Serves 8 to 12

　　1 1/2 cups cake flour (not self-rising)

　　1 teaspoon baking powder

　　1/2 teaspoon salt

　　1 stick (1/2 cup) unsalted butter, softened

　　1 1/4 cups sugar

　　2 large eggs

　　1/2 cup whole milk

　　3 tablespoons finely grated fresh lemon zest

　　6 tablespoons fresh lemon juice

　　blueberry filling

　　7 cups lemon ice cream

　　

Garnish:

Garnish: 2 cups blueberries

　　

Step 1

Preheat oven to 350°F. Butter a 9-inch round cake pan (2 inches deep) and line bottom with a round of wax paper.

　　

Step 2

Into a bowl sift together flour, baking powder, and salt. In a large bowl with an electric mixer beat together butter and 1 cup sugar until light and fluffy, about 1 minute. Separate eggs and beat yolks 1 at a time into butter mixture, beating well after each addition. In 3 batches alternately beat in flour mixture and milk, beginning and ending with flour mixture. Add zest and 2 tablespoons lemon juice, beating until just combined (do not overbeat). In a bowl with cleaned beaters beat whites until they hold soft peaks and beat in remaining 1/4 cup sugar. Fold whites into batter gently but thoroughly. Transfer batter to cake pan and bake in middle of oven until a tester comes out clean, 35 to 40 minutes. Cool cake in pan on a rack and invert onto rack. Cake may be prepared up to this point 1 day ahead and kept in an airtight container at cool room temperature.

　　

Assemble cake

Step 3

With a long serrated knife horizontally halve cake. Put bottom half, cut side up, in a 9-inch springform pan. Brush 2 tablespoons remaining lemon juice over layer. Working quickly, spread half of blueberry filling evenly over layer, leaving a 1/4-inch border around edge, and top with one third ice cream, spreading evenly. Put remaining cake half, cut side up, on top of ice cream and brush remaining 2 tablespoons lemon juice over it. Spread remaining blueberry filling evenly over top, leaving a 1/4-inch border around edge, and spread half of remaining ice cream evenly over filling. Reserve remaining ice cream for outside of cake. Freeze cake, covered, until firm, at least 8 hours, and up to 1 day.

　　

Step 4

Remove side of springform pan. With a spatula loosen cake from bottom and transfer to a plate. Frost cake with remaining ice cream, spreading evenly around sides and top of cake. Freeze cake, loosely covered, at least 2 hours and up to 5 days.

　　

Step 5

Twenty minutes before serving, garnish top of cake with blueberries and put cake in refrigerator to soften slightly.