Turtle Brownies: Frosting for the Cause

For the brownies:

bittersweet chocolate, coarsely chopped

unsweetened chocolate, coarsely chopped

unsalted butter, at room temperature

cocoa powder

large eggs

sugar

vanilla extract

salt

all-purpose flour

chopped pecans

For the caramel sauce:*

sugar

heavy cream

vanilla bean, split lengthwise

coarse salt

vanilla extract

For the ganache:

bittersweet chocolate, finely chopped

heavy cream

*Note: These recipes will make more caramel and ganache than you need for the brownies. But really, when was it ever a bad thing to have extra caramel or ganache?