Instructions

1. To make BERRY FILLING: In a heavybottomed saucepan combine berries and water over medium-high heat. Bring to a boil, reduce heat to medium and cook, stirring often, for 30 minutes. Stir in sugar and continue to cook, stirring often, for 10 minutes. Whisk together lemon juice and cornstarch before stirring into berry mixture. Stir constantly until thickened, about 2 minutes. Transfer mixture to an airtight container and refrigerate until chilled, about 6 hours.
2. Place racks in upper and lower third of oven before preheating oven to 375 F (190 C). Line 2 baking sheets with parchment paper and set aside.
3. To make CAKE BATTER: In a medium-sized bowl, sift together flours, sugar and baking soda.
4. In a large bowl, whisk together egg and vegetable oil. Add buttermilk and vanilla seeds, whisking until well combined.
5. Slowly stir flour mixture into buttermilk mixture just until combined. Drop a level 1½ tbsp (22 ml) of batter into 12 mounds at least 2-in (5 cm) apart on 1 prepared baking sheet. Repeat with remaining batter on second baking sheet. Bake for 10 minutes, switching pans on racks halfway, or until puffed and tops spring back when touched. Let cool on pans for 2 minutes. Transfer cakes to wire racks to cool completely. Repeat with any remaining batter.
6. Just before ready to serve, prepare ELDERFLOWER CREAM: In a chilled bowl, whip cream, elderflower cordial, skim milk powder and icing sugar until stiff peaks form. Whipped cream can be prepared and refrigerated for up to 2 hours before using.
7. To assemble, spread about 1½ tbsp (22 ml) berry filling onto flat side of half the cakes. Pipe or spread about 2 to 3 tbsp (30 to 45 ml) elderflower cream over berry filling and sandwich with remaining cakes. Dust with additional icing sugar, if desired before serving immediately.