Gateau Invisible (Invisible French Apple Cake)

Please watch the video for the instructions. For written recipes & instructions visit: RECIPE Crumbles: 80 g all-purpose flour 40 g unsalted butter melted 30 g brown sugar ½ tsp ground cinnamon Cake batter: 800 g apples before peeling (about 4-5 large apples) 100 g eggs (room temperature) weight doesn't include shell, 2 large eggs 50 g brown sugar 30 g melted butter unsalted 100 g milk 1 tsp vanilla extract 100 g all-purpose flour 1 tsp baking powder ⅛ tsp salt 1 tsp ground cinnamon ¼ tsp ground nutmeg