Frosted Berry Layer Cake

"From the outside, it looks like your standard white cake. But once you slice into it, you’ll be surprised to find the cake layers are studded with chunks of strawberries, blueberries, and blackberries! ⠀⠀⠀⠀⠀⠀⠀⠀⠀ As if this mixed berry cake wasn’t extra enough, it’s also filled with raspberry jam and iced with cream cheese frosting. ⠀⠀⠀⠀⠀⠀⠀⠀⠀ Summer days are almost here. Once berries are in full bloom, you bet I'll be making this cake on the regular."