German Chocolate Cake - Miz En Place

Ingredients

• 8 ounces German sweet chocolate baking bars, chopped
• 1/2 cup strong brewed hot coffee
• 2-1/4 cups all-purpose flour, divided, plus more for pan
• 1 tsp baking soda
• 1/2 tsp kosher salt
• 1 cup unsalted butter, softened
• 1 cup granulated sugar
• 1 cup packed light brown sugar
• 4 large eggs, separated
• 2 tsp vanilla extract
• 1 cup whole buttermilk
• 2 cups chopped pecans or walnuts
• 12 ounces evaporated milk
• 1-1/2 cups granulated sugar
• 3/4 cup butter
• 6 large egg yolks, lightly beaten
• 2-1/2 cups sweetened flaked coconut
• 1-1/2 tsp vanilla extract