01 -
Stir together blueberries, water, and sugar in a small pan. Cover and heat until it simmers, then remove the lid. Let it cook down while stirring once in a while, about 10-15 minutes, until jammy. Cool it down before you use it.
02 -
Fire up your oven to 350°F and prepare three 6-inch cake pans by lining only the bottoms with parchment paper.
03 -
Carefully separate your eggs. Use an electric mixer to beat the whites with the tartar powder until foamy, adding sugar a little at a time to make stiff peaks. Mix the yolks, milk, oil, and vanilla separately. Sift in the baking powder and flour, stirring until smooth.
04 -
Gently fold the egg whites into the yolk mix in three parts, being careful not to deflate it. Divide the mix evenly into the pans (around 185-200g each) and bake for 25-27 minutes until golden. Let the cakes cool upside-down on racks.
05 -
Combine heavy cream, powdered sugar, vanilla, and some of your compote. Whip it up until you see firm peaks forming.
06 -
Spread whipped cream and a bit of compote between each cake layer. Apply a thin coat of cream all over, chill the cake for 10 minutes, then finish with a thick layer. Top it off with blueberries and thyme if you want to get fancy.