10-Layer Chocolate Caramel Mousse Cake

Unflavored powdered gelatin (I used Knox)

Cold water

Granulated sugar

Unsalted butter at room temperature, chopped into pieces

Heavy cream at room temperature

Vanilla bean paste

Heavy cream, cold

Bittersweet chocolate, chopped

Unsweetened Dutch processed cocoa powder

Hot coffee

All-purpose flour, spooned then leveled

Baking powder

Baking soda

Salt

Unsalted butter, at room temperature

Granulated white sugar

Firmly packed light brown sugar

Large eggs, at room temperature

Vanilla extract

Whole milk

Semisweet chocolate, chopped

Unsalted butter

Egg yolks

Granulated sugar

Vanilla bean paste

Heavy cream, cold