Preheat oven to 350 degrees. Grease a 13x9x2 pan with butter.

In a large saucepan, melt the butter over medium heat. Add the sugar and water, and bring to a boil. Remove from the heat and add 12 ounces of the chocolate, stirring until smooth. Whisk in the eggs one at a time, making sure each is incorporated before adding the next. Combine the dry ingredients and mix gently into the chocolate mixture. Stir in the remaining chocolate and vanilla.

Pour the batter into the prepared pan and bake until the center feels just firm to the touch, about 30-35 minutes. Cool on a wire rack. While brownies are cooling, prepare the topping.

Topping Directions

In a heavy saucepan, bring the sugar, corn syrup, water and salt to a boil over medium heat and stir until the sugar dissolves. Stop stirring and let the caramel cook until it turns golden, 10-15 minutes. Remove the pan from the heat and carefully add the cream and vanilla. The hot caramel may spatter when you add the cream, so be careful. When the caramel stops bubbling excessively, stir until smooth, and then stir in the pecans. Spread the topping over the cooled brownies in an even layer. Let cool, then cut brownies into 16 squares.