Preheat the oven to 350°F. Line two 6-inch cake pans with parchment paper.
To make the batter: In the bowl of a stand mixer fitted with the paddle attachment, add the butter, cane sugar, and vanilla bean. Mix on low until there are no butter chunks.
Add the milk and sour cream and mix on low until combined, the mixture will resemble cottage cheese.
In a separate bowl, whisk together the cake flour, baking powder, and sea salt. Add to the butter mixture and mix on low until combined. Scrape down the sides of the bowl and mix again until combined and you have a smooth batter.
Divide the batter evenly into the two pans, they should weigh about 300 grams each. Bake for 30 minutes or until a toothpick inserted in center comes out clean. Let cake cool completely in the pans.
To make the whipped cream: In the bowl of a stand mixer fitted with the whisk attachment, add the heavy whipping cream, cane sugar, and vanilla extract. Whisk, starting on low, to avoid splattering. Gradually increase the speed as the whipped cream thickens until you are at full speed. Whisk until stiff peaks form.
Remove the cakes from the pans. Place the first layer on a cake stand or platter, place half of the whipped cream on the cake and spread evenly, and then top with strawberries. Top with second cake layer and repeat with the remaining whipped cream and strawberries.
Store in an airtight container the fridge for up to 3 days.