Step 1

Preheat the oven to 350°F/177°C and prepare three 6-inch or two 8-inch cake pans by spraying the sides with baking spray and fitting a parchment paper circle to the bottom of each pan.

Step 2

In a medium bowl, add the flour, baking powder, baking soda and salt. Whisk together and set aside.

Step 3

In the bowl of a stand mixer fitted with the paddle attachment, beat the butter at high speed until creamy, about 2 minutes. Add the sugar and cream it together with the butter at medium-high speed until light and fluffy, about 2 minutes, scraping the bowl and paddle at the halfway point. Turn the mixer to low and add the egg whites one at a time, mixing until they are just combined and scraping down the bowl and paddle as needed. Add the vegetable oil and vanilla, increase the mixer speed to high and beat for 1 minute.

Step 4

Turn the mixer off and add the flour mixture all at once. Mix the ingredients on low speed until just combined, then slowly pour in the buttermilk. Continue mixing at low speed for about 30 seconds, until the batter is uniform and combined. The batter will be slightly thin.

Step 5

Divide the batter evenly between the prepared cake pans and bake for 28 to 32 minutes. They’re done when they spring back to the touch and a toothpick inserted into the centers comes out clean or with just a few moist crumbs on it. Let the cakes cool in their pans for 5 minutes, then remove them from the pans and allow them to cool completely on a wire rack.

Step 6

Mix together the berry jam and water. Set aside.

Step 7

Add the strawberries, blueberries, and raspberries into a medium bowl. Toss together with the lemon juice and zest. Set aside.

Step 8

In a large bowl or the bowl of a stand mixer using the paddle attachment, combine the mascarpone and cream cheese. Beat on medium speed until smooth and creamy, about 30 seconds. Add the powdered sugar a few spoonfuls at a time, beating on low speed until combined. Once fully incorporated, scrape down the bowl and increase speed to medium, and beat until fluffy, about 30 seconds.

Step 9

In another large mixing bowl add the cream, vanilla, and almond extract. Beat on medium speed until stiff peaks form, 2 min. Fold the whipped cream into the mascarpone mixture.

Step 10

Once the white cake layers are completely cooled, level them to your desired height. Add a swipe of Chantilly cream frosting onto a cardboard cake circle and place the first cake layer on top. Spread half of the jam mixture onto the cake layer, then add a layer of Chantilly cream frosting. Press half of the lemon coated berries on top. Place the next white cake layer on top and continue filling and stacking the cake with jam, Chantilly cream frosting, and berries. Crumb coat the cake with chantilly cream frosting, then place it in the refrigerator for at least 30 minutes to let everything settle. The chantilly cream frosting will not firm up much in the refrigerator, but it will be easier to frost over after a trip to the refrigerator.

Step 11

To create the design pictured, frost the cake with Chantilly cream frosting and use a small spatula to make diagonal swipes in the frosting on the sides of the cake. Garnish with a crescent formation of fresh berries.